Fog Light Switch Question

[t6dpilot]

OK, here we go - another fog light switch question. 70SATMAN, I am sure you will have the answer! I just obtained an early fog light switch P/N 901.613.503.20 that is in absolutely beautiful condition. The darn thing looks almost brand new with perfect rubber! Way cool. Anyway, I am going to use it for a set of driving lights I obtained from Michael and need a little wiring help.

The hot wire goes directly to the bulb in the middle I am sure, but I am not sure about the other four spade connectors. The four connectors are labeled as K, 1, 2, and 3. Where does the ground wire connect to - K? What are the other spades for - rear fog?

Thanks.

[911quest]

Scott that switch according to the parts diagram is for a 65-68 911 so according to that diagram it has power coming from the fuse panal to two of the terminals then a jumper going to the light not sure where the ground should be connected without seeing the switch.

http://www.pelicanparts.com/911/911_...rical_1965.jpg

component #36 on the diagram

[t6dpilot]

Thanks Tony. Yeah, I knew that it was for a SWB car, but I am going to install it in my LWB car anyway. John Cramer did tell me how the power wires come off the fuse block to the switch, but not exactly to what terminals. From what he tells me, the wire coming from the #6 position on the fuse block is the power (hot) lead, goes through the light then back to the #5 fuse to protect the circuit.

I don't have a picture of the switch handy, but the terminals are configured as follows: light (center), K, 1, 2, and 3 terminals are positioned at the 12, 3, 6, and 9 o'clock positions. Guess I will just have to run a multimeter to all the terminals to see what I have. Thanks.

[edmayo]

Scott I have the 1972 version fog light wiring diagram. The terminal designations are different for the switch but it might help you along with your ohmmeter to sort this out. There is also a relay in the circuit. Don't know if if it is still available but 4 years ago I was able to buy from Porsche the complete harness to the switch from the fuse panel including the relay and its socket for like less than $50.00. I could fax you the schematic if you like.

[Zithlord]

Do you know the part number for the harness?

John

[t6dpilot]

Ed, thanks for the offer of the schematic. I will take you up on that - 630-377-0802 is my fax. I too would like to know if there is a P/N for the harness. Thanks.

I was doing some wiring tracing on my two cars yesterday regarding fog lights. On my 69, there is one wire (fog I am assuming - white with green bands) coming from the main harness that terminates with a female spade connector behind the where the fog switch would be. There is another white with green band wire that goes into the head light switch. I thought, ah ha! that is where the fog wire goes to. Well, I tested continuity and it is not the same wire. What gives here? I also have two white with green band wires that come out of the head light harness and terminate to one female connector near the fuse block. These are different from the factory fog wires in the fender well (white with diag. green stripe). None of the white/green band wire termination points show continuity. What the hell? And where do the darn fender well white/diag. green terminate? They should be on the load side of Fuse Block II in the bottom position. Can't find 'em.

On my 71, the fender well fog light white/diag. green wires do terminate at Fuse Block II bottom position. I am really cornfused here.

[edmayo]

Scott, John, I did this several years ago, so as best that I can reconstruct from my notes, looking at my car, and the parts book again, there are two harnesses involved. The first is the relay socket that snaps in one of the holes above the horn relay, and ties into various connections at the fuse block, and the aux. light switch. The second is the harness that goes up to the switch from the fuse block. They are # 911-612-073-00 and 911-612-027-00 respectively. I was doing this in the course of installing hood lights, so I wasn't tying into the existing wiring that is always bundled up under the headlight buckets.

Scott, I think that other wire, white w/green tracer from your headlight switch should be for the green bulb in your speedo that comes on with the park lights. The white/ green wires that terminate near the fuse block should be from the aux. light wires under the headlight buckets, when all is hooked up they should go to the load side of fuse 8, box 2, don't understand the female spade on them, unless it was to go to a male spade that then took a single wire to #8 fuse. Don't take the difference in white/w green stripe vs. white /w green dots, too literally, they may be for the same circuit, still white w/ green, that's all that counts. This is all a lot easier to understand when you have the official color schematics in front of you, PM me with an address and I can send you color schematics for 69, 71 car wiring and supplemental fog light wiring. John, same goes for you.

[boxster03]

you do not give enough info. if this was a us model 70 or 71 there was no under the bumper fog light option.