Could you have been pulling 12v from the instrument panel, through the bulb and the bulb is burned out? That would cause an open in the brake circuit when everything else is working.
I guess that’s a good possibility. I have some dash lights that aren’t working. When I get to that, I’ll look into this more. in the meantime, I’m powering the relay from the blue field wire. I measured 11.2 volts, and it’s working fine.
Great information. I’m learning a lot about the wiring in this car. Thanks all.
