 Fog lamp wiring, wiring diagrams exclude wire connections for dealer installed fog lamps |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| jeff dodge |
 Nov 6 2025, 01:49 PM
Post
#1
|
|
Newbie  Group: Members Posts: 24 Joined: 5-September 24 From: middleton,WI Member No.: 28,332 Region Association: None  |
My '75 has period correct fog lamps and dash pull switch with terminals 31,15 and K, but the wiring looks suspicious . looking for a simple diagram showing where each of those 3 terminals should be connected, Thanks, Jeff
|
   |
 
|
  |
Replies(1 - 5)
| JeffBowlsby |
Nov 6 2025, 02:54 PM
Post
#2
|
|
914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,111 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
|
Those fogs are on a separate harness, that plugs into the main harness in the front trunk.
Post photos if yours are different. |
 |
|
| Spoke |
Nov 6 2025, 05:18 PM
Post
#3
|
|
Jerry Group: Members Posts: 7,268 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
|
Here's a simplified view of the foglight wiring.
Attached thumbnail(s) 
|
|
|
|
| jeff dodge |
Nov 7 2025, 01:56 PM
Post
#4
|
|
Newbie Group: Members Posts: 24 Joined: 5-September 24 From: middleton,WI Member No.: 28,332 Region Association: None |
QUOTE(Spoke @ Nov 6 2025, 05:18 PM)  Here's a simplified view of the foglight wiring. The diagram that you sent has the same wire color connections as my round fog lamp relay mounted to the far left of the fuse panel, however my fog lamp switch has two wires that were attached. A green connected to terminal 31 mounted to chassis ground and a yellow wire connected to terminal K and then through the front bulkhead to a small 1"square relay mounted to the inner fender just left of the break fluid reservoir. I can't find any info on this small relay. 5 terminals numbered 87,86,30,and two 87 terminals. Does any of this sound familiar? Thanks, Jeff |
|
|
|
| jeff dodge |
Nov 7 2025, 04:46 PM
Post
#5
|
|
Newbie Group: Members Posts: 24 Joined: 5-September 24 From: middleton,WI Member No.: 28,332 Region Association: None |
QUOTE(jeff dodge @ Nov 7 2025, 01:56 PM) QUOTE(Spoke @ Nov 6 2025, 05:18 PM) Here's a simplified view of the foglight wiring. The diagram that you sent has the same wire color connections as my round fog lamp relay mounted to the far left of the fuse panel, however my fog lamp switch has two wires that were attached. A green connected to terminal 31 mounted to chassis ground and a yellow wire connected to terminal K and then through the front bulkhead to a small 1"square relay mounted to the inner fender just left of the break fluid reservoir. I can't find any info on this small relay. 5 terminals numbered 87,86,30,and two 87 terminals. Does any of this sound familiar? Thanks, Jeff I'm sorry the fog lamp relay is mounted on the far right of the fuse panel. |
|
|
|
| Superhawk996 |
Nov 7 2025, 08:10 PM
Post
#6
|
|
914 Guru Group: Members Posts: 7,512 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
|
QUOTE(jeff dodge @ Nov 7 2025, 03:56 PM) I can't find any info on this small relay. 5 terminals numbered 87,86,30,and two 87 terminals. Does any of this sound familiar? Thanks, Jeff See the schematic spoke posted for the relay schematic 85 & 86 are the relay solenoid control 30 is the terminal that 12v power is fed into 87 is the normally open connection (made when energized) 87a is the normally closed terminal (made when de-energized) |
|
|
|
|
3 User(s) are reading this topic (3 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 8th November 2025 - 09:44 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.