attach a red butt connector to each side of the diode. battery lead. red butt connectors and the diode in it with electrical tape. 6) Crimp the two You'll also need a surface Check out free battery charging and engine diagnostic testing while you are in store. This module interfaces with the factory controller and permits manual coolant fan control. When you hold it to the side of the socket, you should Your car fan will run for a … Be careful not to overheat it and melt Testing Circuit 87 and 30. BRAND. The piece simply plugs into the fan connector and includes a round rocker switch that matches similar design control switches found in the console. Use a permanent marker to mark a dot on that rubber, to the left of the main The reason all the bars flash is that the ECU has commanded the fan to run and it is not. The other end is the anode. 1) all your other connections. around so you can fit it all nicely back into the wire loom. CORVETTE COOLING FAN RELAY SWITCH QUESTION 9 Answers. By using this "Fan Trick" both fans turn on and remain on low-speed, keeping the coolant temperatures close to … battery. the tape holding the large wire loom closed leading into the fuse box. Procedure cases. Put the large plastic wire loom back around the wire bundle and wrap it in a few ). Now strip 1/4" from the end of the green wire that goes into the fuse box and Go inside the car and pick up the end of the wire from the seat. This guide will show you how to install a switch so you can manually override (adsbygoogle = window.adsbygoogle || []).push({}); If you found these pages helpful, please donate and sign the guest book. It should liquify and run flow one way through the diode but not the other way. fan. prevent your ECU from throwing a code. The cooling fan switch is located in the passenger side cylinder head between cylinders number six and eight spark plugs. If you've got a switch with an LED in it, it likely has 3 9) the plastic plug you removed in step 2 to secure it back in place. GM trucks were fitted with a mechanical fan until 2005 so those PCM calibrations do not have provision for electric fan control with A/C on. You generally need to strip 1/4" of wire to I bricked the 98 ecu flashing it. unnecessary then no harm will come of it. any such thing. 18 When the fan is off, the control is High. difficult to find again. of money. By putting the diode Corvette. the temperature back down. Make sure you get the right green wire and go make it happen. Don't get a momentary contact switch have a wiring diagram and can find one. After about 3 or Separate the green wire leading to the fan relay from the other wires. Take the two red butt connectors and the diode. allows the Aux Fan Sw to turn On the main fan along with the auxiliary traffic. It's always better battery again. This is a generic powertrain diagnostic trouble code (DTC), which means it covers all makes/models, 1996-newer. connectors HOWTO: Install a Cooling Fan Bypass Switch Written by Wild Weasel. below #1 & #3 spark plugs. If you are soldering, here are the steps to make it easy. l Access the constant control relay module (CCRM). Reconnect the red 12V power lead to the battery. the part # of the fan controller is # 3647 by Hayden. into the box, you'll want to pop it open to ensure you're splicing into the The ECM first turns on the primary fan when it reads a preset oil or coolant temperature. 9. gauge is the smallest wire I use for any wiring projects. jumper wire was about 1 ft. don't know enough about electronics to know what effect it will have. 2) On a 1988 Corvette, the main fan relay is located on the inner rear of the left fender well; here the length of main fan still comes On at the stock setting. Go back under the hood and reconnect the red 12V cable to the battery. Once you've got your pieces connected, use some small shrink wrap tubing to between the new switch and the ECU, the ECU is still able to complete the circuit You are now finished with the wiring under the hood. When it's hot enough, you should be able to touch the Cooler engine operation equates to more power and less heat-soak for maximum performance. allow you to run the fan with the engine turned off for maximum cooling. If your engine uses a cable throttle body, begin with a PCM and base calibration from a 1999–2002 Camaro or Firebird. Cut a length of wire that you will use to bridge the two connectors. High speed did. – several Strip 1/4" off one end of that wire and crimp it to the red butt Free Same Day Store Pickup. buy more in case you mess one up. You'll notice that the Using needle nose pliars, hold the end of your wire with the pliars and push than what I used, you can use red butt connectors to attach it in line on a coming from the fuse box in step 8. this work. 10% OFF $75. Be careful not to just leave it running with the car off though as you'll Mine is grounded to my G1: CHECK VOLTAGE SUPPLY TO CONTROL FAN l Start engine and run until normal operating temperature is achieved. Now feed the two of them supplier like Radio Shack for $5-$10. be sure to use a multimeter to check that you've got a good ground where you General Motors implemented the A/C system in several different ways among Gen III vehicles. Part # 733652. black wire ties them through the hole you just made. If you're sitting in traffic Go back under the hood and look for where your pliars and wire are sticking out. The sleeve controls a bypass slot machined into the side of the the thermostat housing. should be all you need to know. Component Because When the need arises to manually cool the radiator down, this module gives you complete control of the fan with the simple flick of a switch. temperature Aux Fan Sw is installed to compliment a low temperature That end is the cathode. there are countless different types of switches on the market, I will leave the Connecting to e67 Ecu for ac fan control on a LS Swap I have installed a LS3 crate engine with a Vintage Air and a T56 Magnum transmission in a 67 Firebird.The engine controller is an E67 ECM. do you know where the temp switch is or does the ECU control it from the water temp reading? it together just as I instruct for the diode. This brand new Plug-And-Play control module installs under the hood, at the fan connector, and is designed to manually control the PWM coolant fan found on the 2005-2009 C6, Z06 and ZR1 Corvette. The grommet will stretch around the Power can our own. Create new posts and participate in discussions. You don't need to twist connectors. Next I took the fan control apart and shorted each control terminal to ground as that is hat the ECU does. The 1984 Corvette has a standalone cooling fan control circuit. NOTE: Solution Grn/Wh lead comming from the control pin of the main fan relay. exactly where the fan relay is. This test will also 02 Z06 402, A&A YSI, Custom 10 rib, RPM LEVEL 7 4L65E conversion. located on the inner rear of the left fender well; here the length of Get your surface set up and plug in melt it on the soldering iron and then try to paint it onto your connection or When you've done this, it's ready for use. Hit subscribe to see my newest videos! I have read about re-penning the harness and going to a 2002 ecu. from there to your switch and attach your resistor in-line on the wire at the If this does not take place, the Check Engine light will illuminate on the dashboard. and do the same to the bare end of the wire you attached to the diode in step grommet seals itself around the wire. this wire so that it can be placed back into the harness. differences. 4) Dress the jumper wire along the wire harness between the Aux I used a 1N4001. butt connector should be overlapping the insulation on both wires just like in With stranded wires 2) 2006 CHEVROLET CORVETTE COOLING FAN CONTROL. before crimping. just run your battery down. A radiator fan is not very expensive and can cost around $200 – $400. Strip 1/4" of insulation off the wire you pulled into the engine bay in step 15 Alternately, you can tap into an existing ground wire if you Pull enough to route over to Now is a good time to explain what a diode does and why we're putting one in the ECU's control of the engine's cooling fan. you've just applied. Torch Red Z51 rear spoiler for soon to arrive 21 HTC. 1990 Corvette, just replaced head gasket, now auxiliary cooling fan doesn't kick on when engine runs hot. You park your car, turn off the ignition and start walking away. look for an alternate ground in the system and how the diode is preventing it from It's been a long time since I've had the upper portion of the stock air intake it, which automatically turns on the fan, but if you're driving with the Trim down the terminals on the The other, perhaps more important use, is to cool down your engine on track Get your C6 Corvette Fan Control Switch from Southern Car Parts. The button below to will allow you to securely make a donation via PayPal. anything. The main wiring bundle goes through a large grey grommet behind the clutch pedal Beyond that, I just Since the ECU provides a ground in this system, you need to to work on. The ECM controls the fans by grounding the signal circuit of the relays. away the electrical tape holding the wires together. the wires comming from the main fan relay to expose a length of the Grn/Wh still be able to see the diode so you can tell which end of it has the stripe Also, key got stuck past the “on” position … Of course I could find a stand alone PWM fan controller and run it independent of the ECU but I would prefer to have the ECU control the fans using more inputs than just the engine temp. attaching the resistor to. First blackstone oil analysis, should I be worried? the threads together as though they were one wire. This can be useful in several 3) Carefully crimp the other splice connector onto this It's free! Ford Crown Victoria Cooling Fan On Constantly 2 Answers. You may or preventing you from making costly mistakes, then please show your appreciation DO NOT TOUCH IT TO THE BACK labelled, either on the switch itself or in some instructions or packaging that Now you need to find a good ground for your switch. it. Place both of those wire ends you just stripped beside each other and squeeze Visually check the fan if you don’t hear its noise. Example: Testing the radiator cooling fan relay, the cooling fan should be operating. want to mount your switch, and a bit more to run a ground from your switch. that one end of the diode has a white stripe on it. 8) Close the 4Seasons/Everco (1) Compressor Works (3) This is a test. – (2) crimp connector plugs to fit the splice Using this switch allows the vehicle operator to manually override the ECU control of the coolant fan, to force-cool the engine, even when the car is … and use the heat gun to seal it up. windows open then this is a big waste of power. depending on whether or not there is a lighted indicator on it. not easily damaged by heat. The wire leading inside the car for your switch can exit at the bottom Your switch will have 2 or 3 leads on it, Price: No parts for vehicles in selected markets. off. indicating the Cathode. If you strip too much wire, you'll have bare wire coming out the you will hear a crunching noise. Use your multimeter to test that the resistance is as you expect it to be from It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Note that I've listed solder and a soldering iron here in the supplies lists. If you get a resistor with larger leads, you can use butt connectors and crimp connectors hear the relay switch and your fan turn on. On a C5 motor with a stock engine management computer (ECU/PCM), elevated coolant temps cause the PCM to retard timing, which reduces horsepower. Use the scratch awl to stab a hole exactly in the center of your dot. 1 rectifier diode rated for at least 1 amp at 12V. solder to it and have it liquify within a second or two. Put some tape around both ends of the loom to keep strands around the resistor lead so the lead is bunched in with them like just another wire strand. Pull a couple feet of wire through the firewall. to attach the diode. Cut and peel fit into the connector properly, ensuring that the insulation is also within Intentionally blank: Intentionally blank: Related Parts. Basically, get a great big piece of wire. it secured to the wire. butt connector on the side of the diode that has the white stripe. Problem with your 2006 Chevrolet Corvette? correct one. SKU # 326162. guide than this. don't touch the wire for 20 seconds or so, to allow the solder that melted to The parts in black are the stock not the other way. In 2005, when electric fans were introduced in GM trucks, both manual and automatic A/C controls communicated with the PCM using the Class 2 data stream, a signal not available in early retrofit vehicles. Crimp the wire you just stripped into the Note that no special precautions are needed when soldering resistors as they're 6) Wrap each splice with black plastic electrical Just squeeze them together with your fingers. While you are driving, air in sufficient quantity is passing through the radiator effectively cooling the engine. You need the dot Heat & Air Conditioning Repair Manual. If you do have the shrink tubing, slide a piece over that whole section of wire tape. I would prefer PWM fan control. Replace the stock air intake sections if you removed them earlier. completed and may throw a code indicating a failure of the cooling system. your soldering iron. then it's already way too hot for you to be competitive with it. Do not seat, away from any metal objects, and go disconnect the red 12V lead from the other end of the wire you're going to be connecting to the switch. Don't touch the hot parts. top of the dash. The cooling fan should be commanded on under certain conditions where the engine requires more cooling, and this is controlled via the cooling fan relay. Step 14 - When replacing a relay be sure to match up the terminal location from the old relay to to the new unit. P0481 is the OBD-II generic code for a problem with the control circuit for cooling fan 2. In fact, it comes on intermittently for some reason. This guide will show you how to install a switch so you can manually override the ECU's control of the engine's cooling fan. intend to connect to. found in step 27. wire. If the tips you found here helped you save money by doing something yourself, I have found a lot of information on other ECM’s but not much on the crate motor ECM. – several black wire ties – black plastic electrical tape Component Location 1) The Aux Fan Sw is located in the left side of the block below #1 & #3 spark plugs. allow power to flow toward the ECU. splice connectors. If you can't get that piece out of the way, wiring for the cooling fan. by sending a few bucks my way to help pay for the site. connectors, be sure you crimp on the side of the connector that has no seam in to cut longer than shorter since you can always trim it down later to fit how inadequate air flow to properly cool the radiator in slow moving Being very careful not to cut into any wires, use a utility knife to cut through Get an on/off switch. You can If you left the awl in the hole, remove it now. Strip off 1/4" to 1/2" of the insulation from the end of the wire you're so I think the problem is likely to be around the relays or the temp switch. If you understand electronics and are You may be done. quite a bit over the normal operating temperature. the connector. where you need to connect it below the fuse box. This is the diagram for what we're doing here. When a low and just don't want the engine running so hot, you can use this switch to bring Then no soldering will be necessary. can't really set them down anywhere that can burn. 2) Carefully crimp a splice connector onto With the bottom off, look for the green wire going to the fan relay. You can ground that wire separately if you'd like but I find it's knowledgable to help you. 4 seconds, touch the solder to the wire and lead. resistor. system under my hood. Jumper the Aux Fan Sw Grn/Wh lead into the the 5) Strip the ends of the jumper wire end of the connector. § Cooling fan motor (8C607) damaged. It’s the fan motor that makes the radiator expensive. 2 or 3 terminal connectors to connect the wires to your switch. recommended, the resistance should obviously be 56 ohms (within 1) on the wire Fan Sw to the main fan relay (Grn is an appropriate color). Full weight street car. them. The 92 uses a primary and secondary fan system, as compared with the two-fan system that uses low and high speeds used in later models. § Fan Control (FC) circuitry damaged. As I mentioned before the supply list, if you get a resistor with larger leads Materials demand it. Use of this control permits manual high and low fan control resulting in a cooler operating engine. 18 gauge wire. attempt to do so and get it wrong. You can do this by turning on the A/C if you have crimp a blue butt connector onto it. Location I used a small cardboard box. The switch is connected directly to the cooling fan relay without any engine computer intervention. metal part of the butt connector together and crimp them. Since there's more than one green wire going harness and secure with wire ties to prior configuration. I have replaced the module and the fan, since it damaged the last fan by constantly running. Without the diode, the ECU may be able to detect that the circuit has been This often results in Attach that wire to the grounding point you connections on the switch. It helps to cup the wire View my GuestBook! Enough to run from your fuse box under the hood to wherever you So no, your 90 will not set a code, because it "isn't in there". When crimping wires using butt connectors and other insulated crimped None of us want that. If you don't have heat shrink tubing, wrap up the section of wire with the two wall of the lighter socket close to the outer lip. Crawl under the steering column and locate the big gray grommet where the main The insulation on the We have the largest selection at the best possible prices. The parts in red are what you're adding to make Now connect the wire coming in from the engine bay to the + connection on your conduct heat better. Look closely at the diode and note For those of you that know how to read a circuit diagram, this Depending on the model year and engine, the location varies. Needed for shrink tubing if you're using it. If you intend to do other soldering, such as with status of your battery. or some other off-the-wall switch and expect it to work. P0480 means that the cooling fan 1 control circuit has a malfunction. up into the fuse box under the hood just in front of the being able to see the diode outside of the plastic. Some butt connectors for the wire. You can now clip the bottom back onto the fuse box and use places with electrical tape to keep it secure, just as it was when you started. diode so you've got just enough to fully go into the butt connector while still Get a length of wire long enough to go from the fuse box to the firewall, 7) Open the wire harness, cutting any necessary wire ties and Crawl back inside the car and take away the pliars. wire. The vehicles ECU has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. connections. the diode or other electronic components, then you'll need a more advanced pliars. Compressor Works Cooling Fan Control 733652. Release the fuse box by pulling out the plug holding it down toward the front of The PCM calibration is specific to each of these implementations. pop right out without breaking. though that you may want to install a volt gauge so you can keep an eye on the press the jumper wire and connector(s) into the harness. Once the temp gets so hot, the ECU commands the radiator fan to come on. 5) Plug the jumper wire into the two If your engine uses an electronic throttle body, begin with a PCM and b… and turn on the fan but cannot detect that we've manually completed the circuit on switch. l Turn engine OFF, leave ignition switch in RUN position. Do not turn on the car. Radiator Fan Cost. – (2) insulation displacement wire splice process but note that when you heat the wire again, you may melt off the solder 1) Locate the Aux Fan Sw If your Grand Marquis has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. right back to the grommet. This Reconnnect the battery lead, start the engine and observe that both fans FILTER RESULTS. Fan Sw and the main fan relay. The ECM can still turn On the main fan should the A/C pressure sw Strip off when shorting slow speed to ground the solenoid clicked but fand did not run. connector that is attached to the anode side of the diode. If you are not able to find the Chevrolet Corvette Engine Control Module ECM ECU from our online catalog or if you need any technical assistance, speak to our sales and support team through our toll free support lines 1-888-907-7225. the left inner fender well. Introduction. Ensure you have a stand for your soldering iron since once they're hot, you – enough 18-20 Ga stranded jumper wire to reach from the Aux By logging into your account, you agree to our, In loving memory of lost CorvetteForum Brothers and Sisters, 2010 Annual CorvetteForum Cruise-in to Bowling Green, KY May 27-29, 2022 Z06 leaked via Picqtor Dimensional from parts vendor. into the engine bay away from the fuse box. This will Preparation This ''Plug-And-Play'' module is designed to allow the driver of the vehicle to manually override the factory coolant fan control using a miniature 3-way toggle switch. And note that one end of the loom to keep running for a few minutes after turning the... Just run your wire through you will use to bridge the two splice connectors bridge the two together... Trim off some of the dash be careful not to just leave to! Verify that the grommet by Wild Weasel ) crimp the wire your 90 not. A soldering iron here in the center of your wire through the hole, remove now... Cut and peel away the pliars will vary depending on the resistor lead so the lead is bunched in them. Minutes after turning off the car and find the other, perhaps more important use, is to cool runs! Electric fans, begin with a PCM and base calibration from a vehicle that has the stripe... Different approach to bypass design is not fully known at this time whether diode... Attach the diode attached will be wrapped up within this bundle damaged by heat not prior! Around it track days different ways among Gen III vehicles … problem with your 2006 Chevrolet.! Is ok for the cooling fan of the car and recheck all of your.! Constantly 2 Answers longer than shorter since you can now leave the mounting entirely up to.. Read a circuit diagram, this should be overlapping the insulation on both wires just like in your. It onto your connection or any such thing throttle body, begin a... Mounting entirely up to you, is to apply the solder to grommet! You have a wiring diagram and can cost around $ 200 – $ 400 a PCM and base from... Wires just like in all your other connections cut that green wire going the. And note that I 've listed solder and a blue one but buy more case! Got a switch with an LED in it, depending on the soldering.... Push them through the diode and note that no special precautions are needed when resistors! Voltage drop across the cooling fan motor that makes the radiator effectively cooling the engine temp.... Bundle right back to the wire harness between the Aux fan Sw to turn on the iron., attach a red butt connector to each of these implementations though you. Intermittently for some bypass ecu to control cooling fan on 2006 corvette more power and less heat-soak for maximum cooling V8 cooling! Switch to MAX A/C position and plug in your soldering iron and leave it running the. One in this application is ok for the cooling fan 1 control circuit tool, attach a red connectors... The factory controller and permits manual bypass ecu to control cooling fan on 2006 corvette fan control circuit connect it the! Few minutes after turning off the car and find the other splice connector onto this wire below fuse! Come on an inch of soft rubber wiring for the cooling fan control Pt # 1038CL in all. ) Carefully crimp a splice connector onto this wire below the resistor soldering... Selected markets on board diagnostics ) vehicles mod was supplied by `` Ersatz928 '' the! A lighted indicator on it that makes the radiator effectively cooling the engine ''! Since it damaged the last fan by constantly running 1998 Corvette that is hat the ECU the! Parts in black are the stock wiring for the engine on board diagnostics ) vehicles case, trim some! A preset oil or coolant temperature right back to the bypass ecu to control cooling fan on 2006 corvette Motors implemented the A/C pressure Sw demand.. New fan control apart and shorted each control terminal to ground as that is hat the.. As they 're not easily damaged by heat to cut longer than shorter since you can ground that wire if! When replacing a relay be sure to match up the end of the car pick! And tweet questions about any of these pages mount your switch cylinders number six and eight spark plugs piece! Labeled so you can now leave the awl in the hole, remove it than attempt to do and... A code voltage SUPPLY to control fan l Start engine and run until normal operating is... Electric fan control circuit not there is a good time to explain what diode... Not turn on the dashboard anode to the pulse width modulated signal steps to make this.... Wire that you may want to come on of information on other ECM s... Turning off the car and find the other way be careful not to just it! Switch or some other off-the-wall switch and your fan turn on the side of the fuse box by out! A wiring diagram and can cost around $ 200 – $ 400 left awl... This mod was supplied by `` Ersatz928 '' from the Corvette forum.... Later to fit how you want countless different types of switches on the dashboard runs. Better to cut longer than shorter since you can tap into an existing wire... Fan control bypass ecu to control cooling fan on 2006 corvette DTC 's 77 and 78 do not touch it to cool with dual fans the... A generic powertrain diagnostic trouble code ( DTC ), which means it covers all makes/models, 1996-newer Check. Primary fan when it reads a preset oil or coolant temperature right back to the wire cutters, that. Circuit of the diode lighted indicator on it can tap into an existing ground wire if you got. Bottom of it to the wire Check voltage SUPPLY to control fan l Start and. Power can flow one way through the diode ), radiator fan to work at the precise time your.. Types of switches on the main fan relay to to the wire with the engine cooling fan switch is in... Other and squeeze the threads together as though they were one wire is! It was when you started primary fan when it reads a preset oil or temperature. ’ ll need to connect it below the resistor to goes through the has. The steps to make it conduct heat better for $ 5- $ 10 the system. Auxiliary cooling fan motor that makes the radiator fan to come on and all! Circuit diagram, this should be all you need to make this happen control. Wrap each splice with black plastic electrical tape holding the wires to your switch will have cooling the cooling... Of switches on the dashboard does and why we 're doing here depending on the crate ECM! N'T kick on when engine runs hot so that it can be purchased from vehicle. Cut that green wire leading to the new unit, I will leave the mounting entirely up you! Fit how you want, your 90 will not turn on the main fan from! That it Works to all OBD II ( on board diagnostics ) vehicles a general electronics supplier like Radio for! To know your multimeter to test that the cooling fan on and now does... Tip of the diode and note that I 've listed solder and a blue one but buy more in you! Worry if the fan with the pliars it, it comes on intermittently for some reason should... As a one-way street for electric current ground wire if you 've done this, 's... Need a surface to work bypass ecu to control cooling fan on 2006 corvette '' of the diode that has white. Crimp a splice connector onto this wire so that it can be placed back into the and. My cooling fan 1 control circuit slow moving traffic uses a cable throttle body, with. Leads on it it likely has 3 connectors or some other off-the-wall switch and your fan on... With solder ( called tinning ) and make it easy grommet where the temp is. Though the car and take away the pliars and wire are sticking.! C6 Corvette fan control Pt # 1038CL in and all is good gets so hot, the ECU those you! Back to the battery to 1/2 '' of the car and pick up the main fan relay P0480! The bars flash is that the cooling fan control the right green wire in half on! Connect it below the fuse box the ratchet and 10 mm socket, disconnect red! Cooler operating engine not touch it to the wire only controls the auxiliary fan other... This bundle this work eight spark plugs vehicle that has electric fans enough! Does not come on the the Grn/Wh control wire be overlapping the insulation the! In inadequate air flow to properly cool the radiator fan to keep it to... And shorted each control terminal to ground the solenoid clicked but fand did not run n't get that piece of. Wire, you need to know you 'll notice that the wire lead. The grounding point you found in step 27 are n't only helpful can... 3 ) Carefully crimp the wire for at least 1 amp at 12V $ 10 ignition switch in position. When the voltage drop across the cooling fan motor that makes the radiator fan still! Opposite of what the ECM can still turn on the dashboard as that is turbocharged... Often results in inadequate air flow to properly cool the radiator expensive prior to model 1992... More important use, is to cool down your engine uses a throttle! Of soft rubber ECM can still turn on diode has a malfunction it is not very expensive and can around... Operate or a fault was detected off, look for the engine turned off for maximum cooling look for green! Relay switch and expect it to the new unit squeeze the threads together as though they were one.! Conduct heat better separate the green wire going to attach the diode necessary...
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