 75 Fog Light Wiring Help |
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| solex |
 Jul 16 2017, 01:43 PM
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#1
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Senior Member  Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States  |
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 |
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| JeffBowlsby |
Jul 16 2017, 03:08 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,485 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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Try this:
Attached image(s) 
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| solex |
Jul 16 2017, 03:37 PM
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#3
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Senior Member Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States |
Thanks Jeff, can I assume that the switch goes inline between the headlight switch and the existing relay?
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| solex |
Jul 20 2017, 11:14 AM
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#4
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Senior Member Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States |
Anyone have an under the dash picture of the switch wiring?
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| JeffBowlsby |
Jul 20 2017, 11:18 AM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,485 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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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.
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| 914BZH |
Jul 21 2017, 04:22 PM
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#6
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Newbie Group: Members Posts: 2 Joined: 19-October 16 From: FRANCE Member No.: 20,508 Region Association: None |
Hello, please, can you indicate me the reference for these 75-76, I don't to find it...
BOSH...OR/and Porsche... thanks !!! |
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| JeffBowlsby |
Jul 21 2017, 05:35 PM
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#7
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914 Wiring Harnesses Group: Members Posts: 8,485 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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A combination of information on the factory wiring schematic and personal experience documenting these cars.
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| oakdalecurtis |
Jul 21 2017, 06:13 PM
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#8
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Oakdalecurtis Group: Members Posts: 1,323 Joined: 5-June 15 From: Oakdale, Ca Member No.: 18,802 Region Association: Central California
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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.
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| solex |
Jul 23 2017, 06:23 PM
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#9
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Senior Member Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States |
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)   
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| solex |
Jul 24 2017, 11:15 AM
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#10
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Senior Member Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States |
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) 
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