headlights quit - is there a headlight relay?

[TX Mudder]

I know that's probably a dumb question, but I don't know. I can see what appears to be my hazard relay and my turn signal relay, but it looks like there is a third relay or box or something on the fuse box.
The markings on my box are somewhat faded and hard to ead.
The fuse box is from something like a 77-79 k10 (it has bus fuses not glass fuses.)
Can anyone think of another reason my dealights would not work? They were working fine until I took the truck and and beat the snot out of it.
My brake lights work, my turn and hazard lights come on when I turn on the headlights, but the headlights themselves are dark.
I tried jiggling both headlight sockets, but it didn;t do anything. Both headlights are a few months old and I just can't believe they boith went dead at the same time no matter how hard I beat on the old truck.
-- Mike

 

[fourwheelerjeff]

pull the headlight socket and check for electricity with your multimeter, or check continuity on your headlights

 

[SkulzNBonz]

The headlight switch has a built-in relay (?) or something to that effect. Anyway, you have to replace the switch, as there is no way of resetting it.

 

[m j]

could be contamination on the contacts in the switch.
pull it and rip it open, clean the contacts and apply silicon dielectric grease.
to disassemble you have to bend a couple tabs.
could be wrong mine has old glass fuse wiring

 

[BorregoK5]

Check your high beam switch on the floor, thats happened to me in the past. Sounds exactly like it.

 

[johnnyK5]

I agree. My highbeam switch puked with the same symptoms.