GM installs wiring harnesses and fuse blocks configured according to the original options for the vehicle. While the fuse block may have a spot for the relay, that doesn't mean the wiring is installed under the block for it, and that presents a problem as contacts in the block are pressed in and wired for specific options, and may be missing for this option in your truck. Even though you may have the fog light wires to connect to the relay and there is a place for the relay in the fuse block, there may not be the necessary relay socket connectors installed and they are almost impossible to retrofit (although you can try if the fog light wires you have also have the correct connector on the ends).
You can check if all necessary relay socket connectors are installed, and if so, you could try to figure out which wire is installed for the connection you are trying to make, and connect the purple wires to that wire. Otherwise, you may have to install the relay away from the block, and then make the necessary wiring connections (power, ground and output) to it.
SOURCE: hhr fog lights
yes it is you will probably have to have the bcm programmed for the foglight option if your gonna install like factory is
SOURCE: Right side trailer brake light does not work
Did yo check the fuse panel inside the truck its located on the drivers side dash , you have to open the driver side door, in there is a 10 amp fuse that is linked to rt trailer brakes and rt turn signal for the trailer, if the fuse is good there is a black box under the dash located on the floor on the driver side, just to the left of the break, thats where must of the plug in wire harness is for the trailer breaks!
SOURCE: horn on chevy silverado doesnt work. This was a
the horn wire is under the steering column with the turn signal switch molley plug and its a single black/ blk with white stripe wire just hook that to the other wire you found
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SOURCE: 2001 silverado 2500hd a/c HEADACHE
There is a good chance that the electro magnetic compressor clutch is bad and will need to be replaced. The compressor is good, but the clutch system has a short in it at the compressor's clutch, which is causing your fuse to blow.
Test the connection at the clutch for a short if you have a multi meter. If it shows you have a short, then replace the electro magnetic clutch solenoid.
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