3 wires coming out of turn signal switch? Using relays? What switch is that? Better post pics of switch and that diagram. You take a good photos of the diagram and switch and relays and use attachment manager to add to your post.
"I gutted the wiring and rear lights, installed single bulb medium duty truck lights"
You don't say how many bulbs each side in rear?
Anxious to learn this trick.
I'll try to get some picture and the diagram I drew up, for now though to answer the question, I am using one 1157 bulb on each side in the rear.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
