Here's a wiring schematic for a standard Bosch relay. You'd need one relay for high beams and one for low beams.
The source for the control wiring can come off the dimmer switch to terminal 85 of the relay.
I've done this on my SuperDuty to eliminate the voltage drop from the battery, up thru the multifunction switch, and back to the lights. Ford uses wires that are really too skinny for the load and you wind up with the power heating up the wiring instead of lighting up the road.
Last edited by klhansen; 08/25/20186:33 AM. Reason: fixed oops on terminal number.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
