Re: No Interior Lights - Help Needed
The instrument cluster lights are fed from a jumper on the headlight switch. If the headlights come on, there is power.
This power flows through the rheostat then TO the fusebox through the very short "INST" fuse. (What M&H used for this fuse is unknown).
Then the power exits this fuse and the fuse block to feed the instrument cluster, heater control panel, radio and console lights.
You will NOT be able to accurately test voltage at this small fuse. Neither end of it is connected to + power. Remove it and use an ohm meter, self powered test light or fuse tester OUTSIDE of the fuse block.
If this fuse is good and your headlights work, the problem is probably the rheostat section of the headlight switch. It replaces as one part.
How may I help you?
1971 Monte Carlo SS454-496ci 600hp
1999 Trans Am-500hp
2003 Iszu Ascender XL Limited V8