My fire department just purchased a 1996 F150 for utility use and we are trying to figure out the wiring of the headlights to install a set of wig-wags. Does anyone know which wire (color) it is that is for the high beams. We were just gonna splice into them all but if we screw it up the Chief aint gonna be too happy.

Truck is in pretty good shape overall, needs new tie rod ends and ball joints but very little rust overall which is rare in Illinois anymore.

 

I found this - maybe it'll help

Look like it's grey/white ... I'm not an electrical dude, but maybe this will help.

 

Voltmeter