working on chevy 1/2 51. I believe the spot light should go to the + side of the ammeter wehre the horn connects; however, if that is the case I still don't know what king of voltager reducer I should use and or fuse for them.
The reverse light, I think it should be wire to the "B" wire to the regulator or ignition wire.
Your thoughts
The other wire must be to connect to a power source. What truck are ya working on??