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914World.com _ 914World Garage _ 75 Fog Light Wiring Help

Posted by: solex Jul 16 2017, 01:43 PM

Hi All,
It has been a while since I last posted and of course need some help.

I have an OEM set of fog lights and a switch I cannot seem to find a 'how-to' to wire up the switch.

Also based on the research I did do the white/yellow and the brown are the wires that go to the fog lamps.

Any help with the switch would be appreciated.

Thanks,
Dan

Posted by: Jeff Bowlsby Jul 16 2017, 03:08 PM

Try this:

Attached image(s)

Posted by: solex Jul 16 2017, 03:37 PM

Thanks Jeff, can I assume that the switch goes inline between the headlight switch and the existing relay?

Posted by: solex Jul 20 2017, 11:14 AM

Anyone have an under the dash picture of the switch wiring?

Posted by: Jeff Bowlsby Jul 20 2017, 11:18 AM

The wiring connections are behind the dash right where the switch mounts. Its in all chassis harnesses except some of the very early cars. You have the hook up schematic above.

Posted by: 914BZH Jul 21 2017, 04:22 PM

Hello, please, can you indicate me the reference for these 75-76, I don't to find it...
BOSH...OR/and Porsche...

thanks !!!

Posted by: Jeff Bowlsby Jul 21 2017, 05:35 PM

A combination of information on the factory wiring schematic and personal experience documenting these cars.

Posted by: oakdalecurtis Jul 21 2017, 06:13 PM

Here's a thought. Power the foglights through their own relay independent of the headlight switch and high beam disconnect. Now you can use them whenever you want without having to pop up your headlights? Why, you ask? I use mine as daytime running lights when I want now. Easy to wire up this way.

Posted by: solex Jul 23 2017, 06:23 PM

As Jeff stated the wires were there ready to hook up.

I installed the switch and turned on the head lights and then the fog lamps. The switch lit up and I checked the voltage at the wires in the the trunk, 12 V, all good.

I then created a two wiring harness for the fog lamps.

I then attempted to install the housings but they did not fit. The mounting bracket seems to short, also a part of the bumper is in the way of the bracket pushing the housing back at an angle. I took a picture of the housings.

The bumpers originally had fog lamps, no cutting was involved.

Any ideas, is it possible that these lamps are not correct?

Thanks,
Dan

Attached image(s)

Posted by: solex Jul 24 2017, 11:15 AM

Perusing the site and I found this picture.

I do not have the brackets shown in red, are there any other variations that would account for fog lamps in my bumper w/o these brackets?

Attached image(s)