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Latest Car Repair Forum Posts

In Forum: Buick

you're going to have to check it when it's acting up. there is a relay called the HDM relay #35 in the underhood fuse box. you're have to check to see if the BCM is sending out the signal to turn on the relay or the relay is turning on the light by itself. the headlight switch, the BCM or the HDM relay need to be checked when the headlights are on by themselves. scan for codes


In Forum: Chevy Silverado

you should check the power coming out of your fuel pump relay. Should be a pink and black wire. then check power on the tan and white wire that goes to the fuel pump back at the tank or wire harness along the frame. According to the wiring diagram there is a 20A inline fuse between the pink and black wire and the tan and white wire. If you don't get power on the pink and black wires out of the


In Forum: GMC Trucks

well, motorhome/rv's might be different depending on how they use the second battery. Do you know if your vehicle has a battery isolator? (wiring diagram) It may have no isolator and just wire the batteries in parallel. Then you would have the alternator lead to the battery attached to the battery side of the starter relay. NOTE: the wire that goes to the battery connection is not a regulat


In Forum: GMC Trucks

187 rounded off to the closest 10 degrees would be 190. three degrees... either one would meet the requirements for the PCM. yes, most of the time the fix for P0128 is replace the thermostat.


In Forum: Ford Cars

yep, I would look to see if the wheel speed sensor is hooked up and working.


In Forum: Chevy Trucks

as you know, most systems that were controlled with a simple switch before are now controlled by a computer. This is no exception. Your wiper switch does not go directly to your wiper motor. It goes to the body control module. Then the body control module sends the signal to the wiper relays. You will need to check the power going to the relays to see if a relay is sticking or if the body con


In Forum: Chevy Silverado

congrats, sounds like you fixed it. Hope all goes well




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