Why would a 1975 VW's head lights all of the sudden stop working. All other lights work fine. The headlight panel switch was replaced a few years ago. The fuse in the panel switch is fine and all wires are connected.
Country: United StatesMake: VolkswagenModel: 1975
Checking connection of all wires
Did you test to se if Battery Power and Ground are present at the headlamp connectors with headlamps turned on?
Meaning verify the Power/Ground right at headlamp connectors
If one is missing we need to trace the circuit back to relay/switch etc
It's not a complicated circuit
I'd get my hands on an inexpensive DMM (digital multimeter) and set it to DC Volt scale. Then, disconnect one headlamp connector. Hook black lead on DMM to battery ground in car. Then car running and headlamps ON, probe the 2 or 3 wire connector w/ red lead. One pin must have battery voltage. (engine on should read about 13.2-14.5 volts) Then reverse leads, so DMM goes to POSITIVE battery cable of car. Probe connector again. When/If you see Battery Voltage again, you've found a ground.
If this is OK, you need two headlamp bulbs, lol. My guess is the wiring will fail testing and then we need to look further
Because 2 headlamps almkost never blow out at same time, unless your alternator is bad and severly over charging
that can blow bulbs up
This is just a visual refernce of basic headlamp wiring using relays and w/ high beams of course
Sorry, having a hard time reading your answer as I only see a one line scroll here for some reason with your answer. Going through it now.
We can change to Q/A format
that usually lays out best