I have a 2006 gmc sierra...hooked up a stereo system in it...one wire came loose grounded out now I have no instrument panel lights..locks work windows don't...it will not start. Relays and fuses good
They may look good but still be blown, use an ohm meter and test each fuse separately and make sure you test them in both fuse boxes. It does sound like a blown fuse or damaged circuit.
I did ohm everything...it's got 3 fuse boxes...I went through everything to make sure it wasn't relays or fuses...pulled the battery changed it because it was throwing 24 volts...didn't help anything...could it possibly be the PCM?
It could have messed up the programming for the accessories, talk with a dealer about a reflash, see if they might agree with this.
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