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can someone shed some light on this deal... no pun intended. i picked up the switch and was wondering if all the f100/f150s are prewired for the gb light. the shop manual shows the lead, but before i pull the glove box liner i would like input. the truck is a 1978 f100.
I seem to remember adding one to my 77 I had years ago to the factory wiring harness location. I had a truck with no options and slowly added a few minor ones.