I have a 75 1.8 and I am trying to figure out why the fog lights do not work. I just replaced both elements, and when I pull the fog light knob, the fog light know lights up beautifully, but alas, no fog lights. Is there a fuse outside of the panel underneath the steering wheel that I need to find????? I followed the wiring to the lights and I don't see any breaks in the wiring. Any ideas?

Did you check the fuse on the fuse panel?

Fuse 8 IIRC, but don't quote me - check the wire diagram. You can find them on this site and also in your Haynes.

Zach

There is a fog light relay, I don't know if it's on the back of the fuse panel. If your switch is lighting up, more than likely the relay is bad. Sorry, never owned a '75 so I don't know where it is on the car.

Mine quit working and I just twisted the fuse. Try unplugging and plugging the relay back in. When you get it working add one of these from JWest Engineering. Lets you run the fog lights without the pop-ups on. Great mod. Super easy to install.

http://www.jwesteng.com/porsche/914/fog.htm