1989 GMC Suburban Repair Question
GMC Suburban Radio Problem
Those issues shouldnt effect a smog test.
Stereo radio has two voltage circuits. One circuit for clock and radio memory. The other voltage circuit to play the radio. Note the fuses in the diagram.
The computer shouldnt have anything to do with radio or interior lamps.
JDL that is why we were thinking maybe one of the ground wires could be loose or something because before the guy worked on the truck fixing the computer these two things were not problems..., what do you think thanks for the diagram
2 questions asked
Id use a voltage tester, check for voltage at the fuse circuits. Then check the voltage wires at the radio for voltage. You can see the voltage wire colors in the diagram. The ground for the radio is black wire, get at the radio wiring and try a redundant ground, see if it helps.