My friends 01 GTP headlights and dash lights just suddenly do not come on. The radio and hvac display also do not light, the radio display only lights up in accessory mode. I checked both underhood and gloxe box fuses and they all tested ok. The contacts on the headlight switch looked fine and the parking/corner lights work as well as the tail lights. On a possibly related note the speaker volume goes in and out intermittently. Does this sound like and ignition switch problem? How should I further diagnose this issue?
