Headlight not getting power to one side

[Enchilada Jones]

I have a 2003, 996, US model C4.

The driver side headlights do not come on, The turn signal does not come on. The side marker does come on. The turn signal indicator blinks rapidly if I select a left turn.

On the right side everything works as designed.

 

I have removed the headlight and tested the connection socket where the light assembly slides in and connects the circuits.

There are two ground wires there and both of them test as good by putting a test lamp between them (one ground at a time) and positive on the battery.

 

Of the other pin locations in that connection socket there is only one pin that has 12 volts potential to ground when the light switch is in the on position. It doesn't matter if I have the high beam or low beam selected nor does the turn signal change where power is detected.

 

I think, if I read the diagram correctly, that there should be at least two wires providing power to the light assembly. But perhaps that was supposed to be after the one wire fed power to the assembly. I haven't figured out how to understand the symbols indicating connectors and where they are in the car etc.

 

Can anyone tell me what I should be finding as far as power to those pins and under which switch positions they would be 'hot'?

 

The way the socket is oriented it is 2 rows of 6 pins one row over the other. Standing at the front facing the socket the grounds are top left and bottom right and the one pin that I have power to right now is second from left on the bottom row.

Edited May 13, 2015 by Enchilada Jones

[Loren]

If you can flip the switch back and forth and the result changes then you need a new headlight switch.

If not, then you could have a broken connector/damaged connector pins or connector wires pushed out of the socket in the inner fender.

 

Both have been cover here many times before... so please give our search a try once you determine the headlight switch condition.