Question about 2004 Chevrolet Colorado
Condition/Concern: There are possible concerns; Erratic operation of... blower motor, windshield wipers, fog lamps, SIR indicator, cruise control, ABS indicator, battery drain and a possible no start condition. Symptoms may very due to the relay failing to engage or remaining stuck in the closed position applying power even when the ignition is in the off position. There are 2 possible issues that contribute to any of the suspected intermittent failure listed above. Relay 15328864 is used in locations 58, 59, 61 and 62 in the UBEC. Refer to the UBEC cover on the vehicle for the correct relay locations.
The IGN 3 relay, HVAC A fuse and the blower motor are in a series circuit. The test lamp should illuminate if there is no concern with the series circuit. If you unplug the resistor are you getting power to the resistor? If yes check for resistor ground have had blower motors lose ground at the resistor.If ground checks ok check for power at the blower motor if power s getting to the blower motor create a new ground just for testing purposes. Going to post the wiring diagram for the circuit.
You can right click the pic and save to your comp to print out a bigger view. We need to find out where you have power and where you don't.
Posted on Nov 08, 2010
Have a 07 colorado w/the same problem tracked it down to a resistor and after replacing the resistor still didnt work looked into it further and found the ground bad at the resistor and the motor cleaned the grounds on the motor and the resistor cut the wire out of the plug that goes into motor (ground wire) and replaced electrical connector with another one and used rtv around the wire connector going into the motor and reinstalled the motor and good to go now works great all this basically was caused by a bad ground at the motor and the resistor both can cause a problem check the ground at the motor
one wire is orange and the other one is brownish the brownish one is the problem child youll probably find the electrical connector at the motor melted to some degree if so itll more than likely be the culpritl John A.
Posted on Jul 08, 2013
Yes it sounds like the heater selector itself may be bad. Also there is a common problem with those knobs and the wire may have come off. I would pop off the plastic around it and the radio and get in there and see if everything is at should be then consider replacement. Here is a link on a forum talking about the problem in detail:
If you need further assistance please let me know.
Posted on Nov 07, 2010
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