1996 Chevy Silverado z71
I have a buddy who has a 96 Chevy z71 he
said that the headlights taillights and dash
lights all go out when ever the truck starts
to warm up took a volt meter and
everything is good what could this be
well, if they go out when it gets warm that means something electrical is breaking circuit when wire/s get hot.get a schematic and trace that circuit for a open wire,it will probably be broke inside the insulation.
You think it’s under the hood or in the cab
my guess probably engine bay,other thing to check is if it has trailer wiring.
See if the key module is doing it. I had that happen on my Monte Carlo.