1985 F350 headlights don't work
My 1985 F350 6.9 liter diesel headlights don't work,
I've tested light switch, and all fuses , however I
have no power to headlamp plugs,
turn/brake/running lights work, no obvious
damage to wiring harness for head lamps other
than corrosion at plug to headlamp, could this be
caused by faulty dimmer switch on floor?