Headlight circuit not working!!!

[Garageaholic]

on my 88 335, My headlight switch is kinda in "opposite mode". The headlights stay on when the key is out of the ignition, when the light switch is in the off position, but once I turn the switch to the on position, then the headlights go off and everything else goes on!.

Anybody have any ideas? i checked the relays.. Is it a bad ground? or do you think that the switch is bad? i doubt it...

[Febi Guibo]

my bet = bad headlight switch

[mattdk318i]

my bet = bad headlight switch

x2

[Garageaholic]

Have you guys had this problem before? Everything else works fine though....

What wire comes from the headlight switch that goes to the relay?... anybody know the color so maybe I can jump it and see if it is indeed the switch?

[James Crivellone]

Sounds like a splice somewhere is drawing power to places it shouldn't be, or its a ground that is REALLY freaking out.

You could try replacing the switch, however from the sound of things I doubt its that, simple as its a mechanical device with a dimmer, nothing more.

[Garageaholic]

The low beam relay K4:

For pre 88 cars: there is NO 87a pin
For Post 88 cars: there is an 87a pin, but i can't find any wiring diagrams that says where the 87a pin goes to.. is it ground?