HEDALIGHT Disperate faulty, Unexpected fault Options

[searunner]

yesterday coming into my garage, I hear one ritming song- under the cover of my 914 2.0 1974, one strange movement, the LEFT Headlamp go UP and DOWN
The RIGHT Headlamp stays in the closed position.
Normally, I detach the battery of the car when in the garage, but I forgot this time.
The car was without a KEY IN - the Light switch was off -
The last trip with the car ALL was regular, and the headlamp was in working condition.

I can STOP the movement, detaching the battery- but this NO was the solution,
Then I searched for a better solution.
Extract completely the Light switch -(with the BATTERY connected and KEY ON) I have the two headlamps is up and in stable condition - also when I START the engine and move the car, and make a long trip

But if I return the light switch to the POSITION light, the LEFT Headlight return to UP_DOWN movement.

Is clear that I have one short- Or one Relay issue - BUT 914 was full of relays
Can someone help me, to return to a normal 914 ??
I am not a native English so overlook my errors

[Superhawk996]

So from post #32 we know that removing the passenger side stops the continuous up & down movement of the passenger side.

This tells us:
1) The motor itself isn’t shorting to a 12v source.
2) The motor is sourcing current through the relay as intended.
3) We need to figure out why the passenger side relay is continuously being powered.

To figure out #3:

A) Remove the passenger side headlamp motor relay. Manually move the passenger headlamp to the full down position manually if necessary.

B) Put the headlamp switch in the on position.

C)Use a multimeter to measure the green/black wire to the headlamp motor - should be 12v

D) Use the multimeter to measure in the relay socket - pin 85. Should be 12v. Note: the relay will have the pin number on the case that you can use to find the corresponding socket in the rubber relay socket.

E) Use the multimeter to measure the gray wire to the back of the headlamp motor - should be 0v.

See picture below things in green should be 12v. Blue circle 0v on gray wire