Question about 2004 Chevrolet Colorado

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2004 Colorado cooling/heating fan will only run on high speed

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  • Chevrolet Master
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Sounds like the blower motor resistor is bad,thats what controls the speeds. replace that and your fan should work just fine, good luck.

Posted on Nov 13, 2009

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  • Chevrolet Master
  • 2,030 Answers

Check the blower resistor to see if its bad, next check the switch, then check the blower motor itself.

The colorados are know for the blower resistor going bad.

Posted on Nov 13, 2009

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1 Answer

Fan is not working on 2001 Chevy Silverado 2500 truck radiator fan motor?


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.
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 low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan s/p relay and the right 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 low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM supplies a ground path for the high speed fan relay and the cooling fan s/p relay through the high speed cooling fan relay control circuit. This energizes the cooling fan s/p relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the high speed fan relay coil is energized closing the relay contacts and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit to the right 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.
Your best bet would be to take your vehicle to a qualified repair shop !
Relay Driven Dual Cooling Fan Diagnostics

Aug 19, 2016 | 2001 Chevrolet Silverado 2500

1 Answer

Cooling fan motor gets hot when running high speed why


Check the bearings. If the friction is high the fan will not run at rated speed. When it runs slower it uses more current and gets hotter...

Disassemble, clean and lubricate to make sure fan runs full blast and does not burn out.

Or if the fan has two windings, one for starting and one for running it is possible that the high speed run winding has some shorts in it resulting in more current and more heat.

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2004 Venture Chevrolet minivan cooling fan circut


Are you talking about the radiator fan? How hot does the engine get in degrees F? Some makes and models, the radiator fan won't turn on till about 220 degrees F. Check for applicable trouble codes, see if any code that refers to the radiator fan circuit or coolant temp sensor? Some of the national brand auto stores will check codes for free.

Of course, as far as overheating in general, you have the thermostat--water pump and other possible issues. Are you losing coolant?

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1 Answer

Heating and cooling fan not working


sounds like a bad blower resistor.The switch runs a straight 12 volts to the motor in high,but runs through the resistor on the lower speeds.The resistor is located somewhere on the HVAC unit(it requires airflow to avoid premature burnout).

Jul 06, 2012 | 2004 Jeep Liberty

1 Answer

2004 Colorado heater/cooling fan quit working. Had problem with only working on high but could get all sppeds to work by wiggling wires under dash.


The resistor needs to be replaced, common on the Colorado's
http://coloradofans.com/forums/viewtopic.php?f=8&t=48293&p=1038821&hilit=resistor#p1038821
 

Dec 03, 2009 | 2004 Chevrolet Colorado

1 Answer

I have a 2004 Chev Colorado fan only works on #4 speed.


The fan speeds are usually 99% corrected by changing the fan resister board....usually near the fan motor under the dash in front of the pass seat.Cost .......around 30$ for the board.You can do it.
Follow the wires from the fan motor to the board connector.

Aug 17, 2009 | 2004 Chevrolet Colorado

2 Answers

Same Problem, warm air at low RPM's 2006 Saturn Vue


I agree with philip, i have not studied the electrical system. but to my best guess the electric fans are tied into the engine cooling system. when the engine is not requesting the fans to come on. then their is very little air passing threw the cooling package. When their is no cool air passing by the condenser this will not draw the heat out of the refrigerant leaving excess heat in the system and when the cab fan blows this is were the excess heat is getting dumped. then at higher speeds their is enough air passing threw the condenser and radiator to cool them both.

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1 Answer

Blower on my 2004 Chev Colorado only works on high setting #4.


You need a resistor pack, which is likely located in the air box, near the blower motor.

Jun 29, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Blower running on high only


most of the time these have a fan speed resistor in the cooling fan box under the dash there in there to keep them cool due to a lot of heat going through them when there on 1,2,3 and sometimes thay give up. the reason it runs on 4 is that its the highest setting and is getting the full 12 volts and does not run through the resistor. a replacment resistor should get all your speeds back

Apr 06, 2009 | 2001 Jeep Cherokee

3 Answers

Van chevrolet venture 2000


Fifteen minutes! you have bigger problems than only the fans the fans are controlled by a thermo switch that is heated by the coolant, If you have no coolant the sensor cannot activate But fifteen minutes seems like you may have a headgasket problem and steam cannot heat the coolant sensor.OperationNotesThe electric cooling fan operates when the engine cooling temperature exceeds a certain value. The cooling fan on this engine is controlled by the Powertrain Control Module (PCM) . The PCM turns the cooling fan ON by grounding the coil of the cooling fan relays when certain conditions are met. When the A/C is requested, the cooling fan will also be turned ON.

Power for the cooling fan motors are supplied through Maxifuses(R). The cooling fan relays are energized when current flows from the fuses in the Underhood Accessory Wiring Junction Block, and through the relay coils to ground through the PCM. The Coolant Fan 1 Relay Control Circuit is grounded for low speed fans operation. During low speed fans operation, both fans run at a slow speed. The Coolant Fan 1 Relay Control Circuit is grounded for high speed operation. During high speed fans operation, both fans run at high speed.

IMPORTANT: When certain Diagnostic Trouble Codes (DTCs) are present, the PCM may command the cooling fans to run all the time. Perform the A Powertrain On Board Diagnostic (OBD) System Check prior to diagnosing the engine cooling fans.

For more information regarding the Charging System, refer to Charging System Description , and Charging System Circuit Description in Starting and Charging.

If a problem that involves the low speed cooling fan relay control circuit exists, DTC P0480 Cooling Fan Relay 1 Control Circuit should set. If the problem affects the high speed cooling fan relay control circuit, DTC P0481 Cooling Fan Relay 2 Control Circuit should set. A problem with the ECT sensor should set DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage, DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage, DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage, DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage. Any of these DTCs will affect cooling fan operation and should be diagnosed before using the Electric Cooling Fan Diagnosis.

For more information regarding the Cooling System refer to Engine Cooling Fan Description - Electric, and Cooling System Description in Cooling System.


Here is the electrical schematic and how it all is suppose to work,
If you need any further help please contact me Thank you,Randy If you find this information helpful please give me a good rating

www.aceautomotive1.com

Aug 16, 2008 | 2000 Chevrolet Venture

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