I have a 95 F150 Eddie that has 172K that I bought brand new. There is no high/low beam switch on the floor, I replaced the multi switch, all fuses (inside the cab and in the engine bay) are good. Flash to pass works, high beams work, high beam blue light in the dash works, but NO low beams. They both went out at the same time and test out good. I can find no smoking gun per say and would searched the net high and low for a good wiring diagram for the headlights. So...

Can I find a free diagram for the lights?
Does anyone have any idea whats going on with the lights?

Like I said I owned this truck since new, no wiring upgrades, no hacked wires but one thing.
I took the truck to the dealer for the "upgrade" cruise control factory recall and I see the plug (in the master cylinder )they replaced leaking now and leaked all over the connectors below.

Any help I would enjoy it.

 

try replacing one or both of the bulbs.

 

Sadly both.

Thats way I thinking the issue is in the wiring and need to hunt it down.

 

I would start with confirming power at each light bulb plug. No power there, then there issues up the chain. If power, then you have bulb issues.

Had a friend that lost low beams on a car(80's model). I started checking and we found that both low beams had burnt out basically at the same time.

 

Free wiring diagrams are at autozone.com. You need to register but that's easy and free.

 

Maybe bad headlight switch if the high beams just work in the flash to pass mode.