I've had this issue for some time now. Last month I found a really good article about going through your wiring to make sure the dimmer wires were done correctly with aftermarket deck. It even had pictures! Thought I saved it but I guess not and now I can't seem to find it. Post the link if you know what article I'm talking about.
Here's what happened:
So I installed an aftermarket deck, used a harness for it. All was good until it got dark and I turned on the lights. All exterior lights work. There is a split second flash like the dash and climate control lights want to come on. Yes, I swapped the dimmer switch (rheostat) and no luck. That new switch actually started smoking and shorted out. :3d_frown:
Here's what happened:
So I installed an aftermarket deck, used a harness for it. All was good until it got dark and I turned on the lights. All exterior lights work. There is a split second flash like the dash and climate control lights want to come on. Yes, I swapped the dimmer switch (rheostat) and no luck. That new switch actually started smoking and shorted out. :3d_frown: