Low beam out, high beam good

I don’t have access to schematics.

@caribe makaira Can you help out?

 

Op is your rig stock?
Any lighting mods done to it?

 

Given your high beams still work, and both low beams out, it narrows the suspect items to likely a bad dimmer relay. Pull the relay and check for loss of continuity between pin 3 and pin 4. Check the relay socket for corrosion. Check wiring coming out of relay socket from pin 4.

 

Remove the Right Hand Low Beam 10 a fuse with a known good one...just for starters...

 

Low beam fuse is after the dimmer relay - it provides power to the fog relay coil and the dash indicator...