gtroth

Greetings.
In any 'on' position of the head light switch, my left fog light comes on regardless of the position of the fog light switch. Right side fog light works as it should. Any ideas where to look for my short circuit?
Many thanks...

pp000830

Could be be speaking of the marker lamp related to the turn signal being left on when parking the car?

gtroth

No, it's the fog light. Blinkers/markers work as they should in all modes.

briefescape

The European Porsche's have a feature to allow the right or left front/back turn signal lights to illuminate for street parking to warn other drivers of its location. This is provided while there's no key in the ignition. Just turn your signal switch and the light will turn off, there are two steps in the switch for each side .


Cheers Guy

jo-hans

Actually the Canadian cars have the same feature. My old C2 and the current C2S did and does.
gtroth issue is with the fog Lights and not the signal and marker lights.

TMc993

Assuming you haven't already done so, I would start with removing the lamp and making sure all the wiring and connections are as they should be there. It's easy to do and ensures you are working with the lights intact. If all is okay with the lights, then you'll probably need to look at the switch itself, which requires removal of the radio. Here's a Pelican DIY on installing rear fog lamps that shows how to get to the switch for the front fog lamps: http://www.pelicanparts.com/techarti...om/switch2.htm

Hope it works out for you.

gtroth

Yes, my USA car does this too. And yes, you're right, my issue is with the fog light


Yeah, I know, that's the first step. I would like to avoid doing that if there is another usual cause, though, because the bumperette bolts on the other side were badly rusted and took a lot of time and care to get them off without breaking the studs...but I certainly appreciate the good ideas. Thank you!

gtroth

I actually can't see any way for this to happen unless the wire from common point 9 to the left fog light is shorting to a switched +12.

TMc993

Pull the fog lamp relay (R31) and turn your headlamps on. If the fog lamp still lights up, then the problem is in the "downstream" (Towards the lights) from the relay panel and is probably a short as you described.

If, after removing the fog lamp relay, you turn the headlamps on and the fog light does not light up, there are five more relays identical to the fog lamp relay in the panel. Take one that has nothing to do with the headlamp circuit and plug it into the fog lamp circuit.

If the substitute relay eliminates the problem, then you need a new fog lamp relay.

If the problem remains with the substitute relay, you can assume that the problem is in the "upstream" (Towards the switch) from the relay panel.