Head light question, Electrical Options

[KeithTurk]

Couple of quick questions. My headlight door motors work great but the headlights don’t come on. I happen to have another headlight switch that’s proven but it failed to fix the issue.

It’s on a 1974 914 If that’s relevant

Is there a headlight relay somewhere or something I should look at?

My turn signals flash quickly and I only have one brake light. Is it the same as the turn signal and the bulb just burned out? Hmmm ( I can check that pretty quick )

[ClayPerrine]

The headlights and the headlight motors are on completely different circuits that only have the switch in common.

Turn the lights on and turn them on high beams. Then see if you have power to the left 2 fuses on the fuse box. Then turn them on low and check the next 2 inboard and see if they have power. If neither of them have power, it is probably the relay that changes from low to high beam. It's a square metal can located on top of the fuse box. You have to take the mounting screws out and drop the fuse box down. It will be a square, silver can. It will have a red/white wire connected to pin 56 supplying power to it. With the headlight switch on, see if you are getting power there. The outputs come from pin F (high beams)and 56a (low beams). The yellow/red wire will come from the turn signal switch to change from low beam to high beam.


For testing purposes, turn the headlights on and connect the red/white wire to the yellow wire. That should light the low beams. Then connect the red/white wire to the white wire. That should light the high beams.

If all that works, then replace the relay.