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Does anyone know where is the relay for the electric cooling fans on a 06 gmc 4.8

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  • Cars & Trucks Master
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They should be in the power distribution box under the hood there. It's a fuse and relay block, carrying and distributing all the power from the battery and alternator to the whole vehicle. Several relays, some maxi-fuses, and regular fuses are in this box. The cover over it should have a diagram of relay and fuse location. You may have two relays there for the fans.

Posted on Jan 05, 2013

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Posted on Jan 02, 2017

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SOURCE: engine cooling fans not working

if relays are good its most likely the engine coolant temp switch

Posted on Mar 24, 2009

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SOURCE: fan cooling problem. which and where is the relay or fuse for the cooling fan? I need a diagram showing me what the relays are for and what they operate.

I have the original owners manual, and it says that there is a fuse (No 16) and a relay (No 10) for the blower motor. I've same troubleshooting right now. If you wants send me a email to luisfernandovaldes@hotmail.com to send you a scan imagen of the fuses diagrams.

Posted on May 04, 2009

  • 1 Answer

SOURCE: i have replaced every thing in this 2000 dodge

tha fan relay is in the relay box under the hood on the drivers side.

Posted on Jul 20, 2009

  • 1779 Answers

SOURCE: cooling fan relay

megn, It's a shame the dealer wouldn't take the time to help you out (morons), I am having trouble locating a parts listing for the vw, because it's a newer model, listings are a bit more difficult to find, mainly because there isn't a big demand for parts yet, as the vehicle is relatively new. Most vehicles do have a cooling fan switch, which turns the cooling fan on as needed, this is controlled by a temperature sensor. Either one can fail, and cause the fan to run constantly, or not run at all. If you want to get to the bottom of the problem, and gain car repair knowledge that will help you deal with the 'morons' in the future, I would strongly recommend signing up for access to a reoair manual for your Jetta at 'alldatadiy'. There is tons of info and diagrams (for about $27 for one year access I believe). It will take time to look through the info, but it will give you the power of knowledge and confidence to deal with the morons. Well worth it. Good luck.

Posted on Jul 27, 2009

  • 593 Answers

SOURCE: 06 vue cooling fan wont shut off tried new relay

The power for the fan comes from 2 relays in the
junction block on the left fender. One is a high fan relay 40amp the other is the low fan relay 20amp.
If either one is stuck, it will power the fan. Also if the
engine coolant temp(ect)sensor is bad, it can send a
false signal to the engine control module(ecm) and powering the fan. With the engine cool, if the fans still
running. Unplug the ect sensor(on thermo. housing)
if the fan stops replace the sensor. If not pull the relays one at a time. And see which one stops the fan. If none of this works it may be an ecm problem.
Hope this helps.

Posted on Mar 21, 2010

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1995 Lt1 Camaro cooling fans operate like this; Cooling fans (2 fans) come on 30 seconds after start up on high, stay on while driving, and turn off when brakes are applied. Stock car, no mods.


Did you have it checked for DTC'S - diagnostic trouble codes ? The cooling fans are controlled by the PCM - engine computer , with the use of three relays ,located in the under hood electrical center . Do you know how to do electrical testing ?
Relay Driven Dual Cooling Fan Diagnostics Looking at wiring diagrams i don't see any connection between the brakes an cooling fans . Checking for DTC'S an doing electrical testing of control circuits from the PCM , Power circuits from the fuse / relay box . Checking grounds an pulling relays ,check for corrosion .

Electric Testing Techniques You Need to Know

View wiring diagrams here http://www.bbbind.com/free_tsb.html

ECM Inputs and Outputs Diagnosis


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1 Answer

2010 GMC Sierra radiator fan loud and seems to run all the time 5.3 vortex


Deanna, check to see if your A/C is in the on position, this could cause fan to run a lot. If this is not the case, take truck in for diagnoses at a good shop, could be a faulty heat/fan sensor or sticking relay. Check the attached links,instruction and guides, Good luck
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2005 gmc yukon fan relay location


In the under hood fuse / relay box ! There are three of them COOLFAN/relay 1-2-3 . It's marked on the under side of fuse box lid .
The engine cooling fan system consists of 2 electrical cooling fans and 3 fan relays. The relays are arranged in a series/parallel configuration that allows the powertrain control module (PCM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block.

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Where is fan motor relay located?


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Cooling fan continunity check ???? One has continuty other does not ??????


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I have a 2006 gmc envoy xl that sounds real loud like a jet when you start it up and when excelerating it gets louder and louder. Could it be the fan clutch or the relay any answers anyone


Fan clutch failure is common on these........and very costly to replace. With the engine cold, engine off, reach in and turn the fan, it should turn with minimal resistance, if it has heavy drag, or wont turn at all, it needs replaced.

Apr 27, 2010 | 2006 GMC Envoy Xl

1 Answer

Code p1652 on a 1996 pontiac grand prix does anyone know what it means the book for computer codes is incomplete


Trouble code P1652 means: Cooling Fan 2 Relay Control Circuit Malfunction

I would start by checking power supply to the cooling fans,making sure the coolant system is full,& using a scn tool to verify the proper operation of the cooling fan system.Here is some info to help you.

The Powertrain Control Module (PCM) controls the operation of the cooling fans. This is accomplished by providing a ground path for the cooling fan relay coils within the PCM. The relay contacts will close and complete the circuit between the fusible link at the battery junction block and the fan motors. Whenever there is a fan ON request both fans will be running.

Power for the fan motors is supplied through a fusible link at the battery junction block. Battery positive voltage is applied to the cooling fan relay contacts and coils. The cooling fan relays are energized when current flows through the relay coils to ground at the PCM. The cooling fan relay #1 control circuit is used for low speed cooling fan operation. The cooling fan relay #1 control circuit and the cooling fan relay #2 and #3 control circuit are both grounded for high speed fan operation. The cooling fan relay control circuits are monitored by the PCM. Before using the Electric Cooling Fans diagnostic tables be sure to perform the Powertrain On-Board Diagnostic System Check. If diagnostic trouble codes P1651 or P1652 are present, use the appropriate DTC diagnostic tables prior to performing Electric Cooling Fans diagnostics.

Important:
When certain Diagnostic Trouble Codes (DTCs) are present, the PCM may command the cooling fans to run all the time. It is important to perform the Powertrain On-Board Diagnostic System check prior to diagnosing the engine cooling fans.The PCM will complete the ground path for cooling fan relay #1 under any of the following conditions:
- When engine coolant temperature exceeds 105°C (221°F)
- When A/C is requested and ambient temperature is greater than 10°C (50°F)
- When A/C refrigerant pressure is greater than 190 psi (2 volts)

For high speed cooling fans operation, the PCM will delay control of the cooling fan #2 and #3 relays for 6 seconds. The 6 second delay ensures that the cooling fan electrical load will not exceed the capacity of the system. The PCM will complete the ground paths for cooling fan relays #1, #2, and #3 under any of the following conditions:
- When engine coolant temperature exceeds 113°C (235°F)
- When A/C refrigerant pressure is greater than 275 psi (2.9 volts)

If a problem that involves the low speed cooling fan relay control circuit (cooling fan relay #1 control) exists, DTC P1651 should set. If the problem affects the high speed cooling fan relay control circuit (cooling fan relay #2 and #3 control), DTC P1652 should set. A problem with the ECT sensor should set DTC P0117, P0118, P1114, or P1115. Any of these DTCs will affect cooling fan operation and should be diagnosed before using the Electric Cooling Fan Diagnosis table. The Electric Cooling Fan Diagnosis table should be used to diagnose the PCM controlled cooling fans only if no DTC is set.
Hope this help to solve your poblem (remember rated and comment this help).

Mar 21, 2010 | 1996 Pontiac Grand Prix

3 Answers

1997 Jimmy power windows not working and ABS light is on also the FAN won't work. I have checked all fuses ok. Anyone know whats going on. Thanks Steve J


the driver side is the main source of power 4 the windows. you will need 2 replace the electrical board on the door for the windows. try running a wire from the battery to the fan on the positive. if the fan comes on check the relay. if not bad fan

Jul 12, 2009 | 1997 GMC Jimmy

1 Answer

Cannot find cooling fan relay


check the owers manual for location usualy in the main electrical box under the hood. they are just a pull out plug with 4 prongs some times 5 pull straight back youll b fine

Apr 28, 2009 | Buick Century Cars & Trucks

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