What I need to know now, How many wires go to the + side of the coil. I know 1 yellow one I found that one. (this is a fire truck they had added a wire to the yellow one and ran it to the battry side of the tach on the front) then ran another wire from that terminal back to the + side of the coil.
I was thinking it cranks on 12 volts then switches back to the resistor wire when you let go of the key.
