HOW TO: Wireing the rear fog with the 5 light mod

compu_85 · December 30th, 2004, 22:24

After loafing around, I have condenced this into a PDF.

Connecting the rear fog light on the A4 Jetta, while keeping the 5 Light Mod

-Jason

pepper10 · December 31st, 2004, 05:10

Gret job Comp! Saved me the trouble of making the how-to...

dieseldorf · December 31st, 2004, 05:54

Quote:

(image credit: DieselDorf)

Ahhh, Mr Singh...ohh, never mind

Nice job...I'll have to study it later. HNY !

pepper10 · December 31st, 2004, 06:55

Comp,
the VW Wire Repair Pin Part # is 000-979-133
HNY!

GetMore · December 31st, 2004, 10:15

I like it! Dual function, added safety. Good work!

DriverFoundNC · December 31st, 2004, 16:52

And if your car doesn't have the icon in the instruments, you can pretty easily make that icon illuminate in the euroswitch itself:
http://irc.junglist.org/fogmod/ ...very easy.

mtltdi · January 1st, 2005, 22:07

Nice how to! I'd like to add that tie wraps and/or hockey tape wrapped around the wire as it passes over the drivers side rear wheel well keeps the wire from tapping and driving you insane.

penclnck · January 2nd, 2005, 10:06

Quote:

[*]5 “Female side terminals” I don’t know if that is the right name, but this is what you want:

This is a "Faston" style terminal, I believe created by Tyco/Amp (who is a OEM supplier for VW/Audi). It will be the .250 size needed, to which is the "common" size, and most of the time the only size you will find at hardware/automotive stores.

volmaniac · January 4th, 2005, 09:47

great write up. i installed the fog bulbs and the diode jumpers last night. i won't get the euroswitch until the cullen ecode group buy is shipped, so i did not run the wire back yet. at least i have the brighter stop lights for the time being.

also, i read in tongsli's oem foglight thread that crimping is better than soldering, so i shortened the leads on the diodes and connected them to the wires with crimp connectors. it made a nice compact electrical connection.

jettajim · January 5th, 2005, 01:14

Nice job!!

What powers the foglight--the wiring harness? Is this why we MAY have to use a 15A fuse? The jumpers do not need to be in place for just the foglight to operate--correct? You simply wanted the brake lights and fogs to come on simultaneously--correct?

If the answers are yes, I'm definately doing this! Thanks for the work!!!

compu_85 · January 5th, 2005, 08:39

The fuse sends power to the euroswitch. When I pull it on my car the front fog icon doesn't light. So, the fuse is just for the fog light, there are seperate fuses that run the brake lights, and also run the rear fogs when they are operating as break lights.

Yep, the jumpers are just if you want the 5 light mod too. If you don't want to do that part, you don't have to install them. If the rear fog light was the only thing you were connecting, you also wouldn't have to use any diodes. BUT, FWFI, I think the 5 light mod is a good safety improvement. So even if you didn't want to install it now, I would wire in the doide for the fog light wire, in case you wanted to do the 5 light mod later.

-Jason

cevans · January 5th, 2005, 08:53

Well, I just did this last weekend, before this beautiful write up! Anyway, one suggestion. If you see the one picture with the taillight, the OEM wiring harness plug has one open spot. That is the OEM location for the rear fog. Use the other end of the repair wire (that you plugged into your switch) and put the pin in that slot instead. A little more OEM and just a cleaner install...

cevans

Radman · January 5th, 2005, 10:38

Which Diodes did you get? I went to my local electronics part supplier at lunch and there is literally 100's of different kinds of Diodes. Do you have the Radio Shack part number?
Excellent write up BTW!

compu_85 · January 5th, 2005, 13:25

Sorry... I allready threw the box away

But it was a 3A rectifier diode.

Using the repair wire would have given a cleaner install... didn't even occur to me. Thanks for the tip!

-Jason

volmaniac · January 5th, 2005, 16:39

the radio shack numbers on the diodes that i bought are 276-1144, 3 amps 400PIV.

don't want to hijack this thread, but here is some more information in this link to ecstuning's oem rear foglight install.