Question about 2005 Chevrolet Equinox

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Equinox overheating, found one of the cooling fans not working. Checked for voltage on connector, only found voltage by taking the ground probe and placing it on a known good ground. Where dose the fan connectors ground wire go to?

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SOURCE: Chevy equinox overheating because the

you should be able to purchase the connectors at a auto accessories shop or an electronics shop they don't have to be exactly the same as long as they do the job, but be very careful & make sure the wires are connected exactly the same as they are,if you reverse the polarity the fans will spin in the wrong direction & will not cool the engine properly......hope this helps......cheers.

Posted on Jun 24, 2011

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SOURCE: My 2006 Chevrolet equinox cooling fans and front

I would find the circuit breaker relay that supplies power to whichever power distribution box that contains the cooling fan relays. If the box has power, then you may want to consider the following: I feel that if you find out why the fans quit working, then you may also have solved the front turn signal issue.

Electric Fan(s) not working, Checking the fan(s), relay, fuse and engine temperature sensor's.
Verify that the fans work by unplugging them and run jumper wires to the fan(s) from the battery. If they run, your problem lies elsewhere. If either does not run, it's the motor.
Next thing to check is for power at the fan connectors. You have to be cautious doing this because the engine needs to be running and warm if not almost hot, and the A/C also needs to be on. (Both must be on and running for the duration of this checklist.) The A/C fan is on the passenger side and should come on almost the instant the A/C is turned on. It is also the secondary engine cooling fan and should cycle on and off in relation to engine temperature, (If the A/C is OFF). Use a test light to probe the two wires on each fan. If you find power, the fan motor(s) is/are probably bad. If there is no power to fans, roll up your sleeves!

The temperature switch is usually located above the oil filter. If the dash gage is working, its probably OK. Next is the Fan Control Temperature Sensor, located IN or CLOSE to the thermostat housing. You will find out if it is working later is this checklist. I just wanted you to know where it is. Next is the relays and fuse's. Usually located in the engine compartment on the passenger side power distribution box. You will need to remove anything over the cover to open it. If the fuses are OK, tap on the relays or pull them out and push back in. If the fans are still not running, pull a relay and probe the socket terminals for power. Two of the terminals should have power, usually criss-cross from each other. One hot terminal is battery power, and the other is the "signal" voltage which triggers the relay to send 12V battery power to the fan. This signal voltage comes from the sensor at the thermostat. If only one terminal has power, then I would replace the sensor at the thermostat, if not both sensors.

Posted on Aug 19, 2011

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2004 Chevy Monte Carlo 3.4 the a/c stopped blowing,then it started overheating to the red within a couple miles,replaced the thermostat,the relay switch some days it overheats sometimes it runs fine


Are the cooling fans coming on ? What relay switch did you replace ?
The BCM will request low speed cooling fan operation from the PCM under the following conditions:
?€¢
Engine coolant temperature exceeds approximately 103?°C (217?°F).


?€¢
When A/C is requested and the ambient temperature is more than 10?°C (50?°F).


?€¢
A/C refrigerant pressure exceeds 1310 kPa (190 psi).


?€¢
After the vehicle is shut off if the engine coolant temperature at key-off is more than 117?°C (243?°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.


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 PCM to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the engine wiring harness junction block. The ground path is provided at G101.
During low speed operation, the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the FAN CONT #1 relay coil, closes the relay contacts, and supplies battery positive voltage from the FAN CONT #1 fuse through the cooling fan motor supply voltage circuit to the right cooling fan. The ground path for the right cooling fan is through the FAN CONT #2 relay and the left cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the PCM supplies the ground path for the FAN CONT #1 relay through the low speed cooling fan relay control circuit. After a 3-second delay, the PCM supplies a ground path for the FAN CONT #2 relay and the FAN CONT #3 relay through the high speed cooling fan relay control circuit. This energizes the FAN CONT #2 relay coil, closes the relay contacts, and provides a ground path for the right cooling fan. At the same time the FAN CONT #3 relay coil is energized closing the relay contacts and provides battery positive voltage from the FAN CONT #2 fuse on the cooling fan motor supply voltage circuit to the left cooling fan. During high speed fan operation, both engine cooling fans have there own ground path. The result is a parallel circuit with both fans running at high speed.
Is your vehicles check engine light lit ?
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Jul 10, 2015 | Cars & Trucks

2 Answers

My 1999 ford escorts cooling fan is not working


These are normally easy to diagnose if you know a little about vehicle maintenance...Check the fan fuse/relay to begin with..Check all connections/wiring to fan...Also it has a sensor..The best way to eliminate if the fan is bad or not is to use simple jumper wires..Disconnect fan motor connector and take two jumper wires..the fan motor should have two connectors..Run one wire to hot battery post and one to negative battery post ..Connect one to hot connector of motor and one to ground..If fan doesn't work fan is faulty..

Feb 21, 2015 | 1999 Ford Escort

1 Answer

I have 1994 oldsmobile cutlass supreme i have replaced both cooling fan relays and tested both fans with jumpers both worked when tested but only one works pluged in to car need help.


Have you tested the wiring between the two fans? Back probe the fan that's not working, whats the voltage reading at the fan connector? If 12V check for a lose or broken wire between the connector and the fan. If no voltage the wiring between the fan connector and the fan has an open circuit. Also don't overlook the possibility of a bad ground for that fan.

Aug 15, 2014 | 1994 Oldsmobile Cutlass Supreme

1 Answer

My 2005 equinox cooling fans come on for a few seconds &shut off making engine over heat &OVERHEATING What is the problem?


Should be a relay somewhere in the engine compartment - may be failing. You may be able to switch with another relay to diagnose.
Check your owners manual under fuses and relays.

Jun 23, 2012 | 2005 Chevrolet Equinox

2 Answers

Where is the fan relay sensor on a 2005 chevy equinox


Check to see if COOL HI fan fuse under hood is blown if so replace, test wires voltage and fan motor.

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Dec 23, 2011 | 2005 Chevrolet Equinox

1 Answer

My 2006 Chevrolet equinox cooling fans and front turn signal lamps have abruptly stopped working. Tested the fans=good. Tested flasher bulbs=good. Do I need new wiring harness? Maybe a connection...


I would find the circuit breaker relay that supplies power to whichever power distribution box that contains the cooling fan relays. If the box has power, then you may want to consider the following: I feel that if you find out why the fans quit working, then you may also have solved the front turn signal issue.

Electric Fan(s) not working, Checking the fan(s), relay, fuse and engine temperature sensor's.
Verify that the fans work by unplugging them and run jumper wires to the fan(s) from the battery. If they run, your problem lies elsewhere. If either does not run, it's the motor.
Next thing to check is for power at the fan connectors. You have to be cautious doing this because the engine needs to be running and warm if not almost hot, and the A/C also needs to be on. (Both must be on and running for the duration of this checklist.) The A/C fan is on the passenger side and should come on almost the instant the A/C is turned on. It is also the secondary engine cooling fan and should cycle on and off in relation to engine temperature, (If the A/C is OFF). Use a test light to probe the two wires on each fan. If you find power, the fan motor(s) is/are probably bad. If there is no power to fans, roll up your sleeves!

The temperature switch is usually located above the oil filter. If the dash gage is working, its probably OK. Next is the Fan Control Temperature Sensor, located IN or CLOSE to the thermostat housing. You will find out if it is working later is this checklist. I just wanted you to know where it is. Next is the relays and fuse's. Usually located in the engine compartment on the passenger side power distribution box. You will need to remove anything over the cover to open it. If the fuses are OK, tap on the relays or pull them out and push back in. If the fans are still not running, pull a relay and probe the socket terminals for power. Two of the terminals should have power, usually criss-cross from each other. One hot terminal is battery power, and the other is the "signal" voltage which triggers the relay to send 12V battery power to the fan. This signal voltage comes from the sensor at the thermostat. If only one terminal has power, then I would replace the sensor at the thermostat, if not both sensors.

Aug 19, 2011 | 2006 Chevrolet Equinox

1 Answer

Chevy equinox overheating because the cooling fan connectors are bad.. can you purchase the connectors and fix yourself?


you should be able to purchase the connectors at a auto accessories shop or an electronics shop they don't have to be exactly the same as long as they do the job, but be very careful & make sure the wires are connected exactly the same as they are,if you reverse the polarity the fans will spin in the wrong direction & will not cool the engine properly......hope this helps......cheers.

Jun 24, 2011 | 2006 Chevrolet Equinox

2 Answers

Electric Radiator Fan Does Not Come On


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May 16, 2010 | 2007 Chevrolet Silverado 1500 2WD

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Where is the switch that cuts on the cooling fans on a 2000 grand am with a 3.4 engine


The computer turns on the fan. Based on sensors from the motor.
DTC P0480 - COOLING FAN CIRCUIT

Circuit Description

The cooling fan is controlled by PCM through the fan relay based on inputs from ECT sensor, IAT sensor, A/C selector switch, A/C refrigerant pressure switch and vehicle speed sensor. PCM controls cooling fan by grounding cooling fan control circuit which turns on cooling fan relay.

The fan relay will be commanded on when ECT reaches 223°F (106°C) or greater, A/C is requested or vehicle speed is less than 38 MPH. Cooling fan relay will also be commanded on regardless of vehicle speed when a DTC is set requesting cooling fan to be on, ECT is 304°F (151°C) or greater, or A/C refrigerant pressure is high. Cooling fan may also be commanded on when engine is not running, on certain conditions.

Conditions for setting DTC:

Battery voltage greater than 9.5 volts.

Cooling fan fault line detects a malfunction for 6 seconds.

1. Check cooling system. Ensure coolant level and belt tension are correct. Adjust/repair as necessary. After repairs, go to step 23). If no adjustment or repairs were required, go to next step.

2. Turn ignition on, with engine off. Using scan tool, check if cooling fan is operating with ECT at less than 209°F (98°C). If cooling fan is off, go to next step. If cooling fan is on, go to step 4).

3. Command cooling fan relay on. If cooling fan operates, go to step 23). If cooling fan does not operate, go to step 5).

4. Turn ignition off. Disconnect PCM harness connector. If cooling fan turns off, go to step 23). If cooling fan does not turn off, go to step 6).

5. Disconnect cooling fan relay harness connector. Using a test light connected to ground, probe battery feed circuits in relay harness connector. If test light illuminates on both terminals, go to step 7). If test light does not illuminate on both terminals, go to step icon_cool.gif.

6. Disconnect cooling fan relay harness connector. With test light connected to ground, probe battery feed circuit in relay harness connector. If test light illuminates, go to step 9). If test light does not illuminate, go to step 10).

7. Connect a jumper wire between cooling fan relay battery feed and cooling fan battery feed circuit. If cooling fan operates, go to step 11). If cooling fan does not operate, go to step 12).

8. Repair open in battery feed circuit. After repairs, go to step 23).

9. Repair short to voltage in cooling fan battery feed circuit. After repairs, go to step 23).

10. Connect test light battery voltage and probe cooling fan control circuit. If test light illuminates, go to step 13). If test light does not illuminate, go to step 21).

11. Connect test light to battery voltage and probe cooling fan control circuit. Using scan tool, command cooling fan on. If test light illuminates, go to step 14). If test light does not illuminate, go to step 15).

12. With jumper wire still connected, disconnect cooling fan harness connector. Using test light connected to ground, probe cooling fan battery feed circuit. If test light illuminates, go to step 16). If test light does not illuminate, go to step 17).

13. Repair short to ground in cooling fan control circuit. After repairs, go to step 23).

14. Check terminals to cooling fan relay. Repair as necessary. After repairs, go to step 23). If terminals are okay, go to step 21).

15. Check cooling fan control circuit for open or poor connection. Repair as necessary. After repairs, go to step 23). If circuit or connection is okay, go to step 22).

16. Connect test light to battery voltage and probe cooling fan ground circuit. If test light illuminates, go to step 1icon_cool.gif. If test light does not illuminate, go to step 19).

17. Repair open or poor connection in cooling fan ignition feed circuit. After repairs, go to step 23).

18. Check for poor connections at cooling fan harness connector. Repair as necessary. After repairs, go to step 23). If connections are okay, go to step 20).

19. Repair open or poor connection in cooling fan ground circuit. After repairs, go to step 23).

20. Replace cooling fan motor. After replacing cooling and motor, go step 23).

21. Replace cooling fan relay. After replacing relay, go to step 23).

22. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.

23. Turn ignition on, with engine off. Command cooling fan on. If cooling fan operates, system is okay. If cooling fan does not operate, repeat step 1).

May 16, 2010 | 2000 Pontiac Grand Am GT

2 Answers

I have a 2006 Equinox. the cooling fans will not turn on. I replaced the cooling sensor and the fans worked for a short period then quit. What would be next? I've checked the relays and fuses and all are...


"bad" or dirty antifreeze is still wet and gets just as hot as good antifreeze. That's not your problem. Re-check that the sensor you put in is still good, may be defective. Make sure that the coolant level is full, if coolant does not reach the sensor, that could cause a problem. Otherwise, assuming that your tests are good, check wiring to make sure signal is getting where it needs to go. Could be computer but that is pretty rare.

Aug 07, 2009 | 2005 Chevrolet Equinox

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