@EAST Thanks for putting in such an effort!! This will definitely be a useful guide to many in the future!

 

@EAST thank you! You've actually helped me with another project I have planned for myself. I'd like to have my fogs available to be turned on any time the DRLs/parking lights are enabled.

Not able to use the stalk switch though, I'll need to add a switch, but I have some ideas already.

 

Yea, you don't need to have the fog switch to do front or rear fog and still have the icon in dash illuminate.

Actually, since I did the front fog wiring and ran the control wire inside a few days before the rest of the project, I did run with the fogs just on all the time. I just grounded it to a bolt under the dash. This would be the wire going into connector 5D - Pin 22. The front integration relay doesn't care, and will have the fogs on any time the tail lights are on. So, in parking mode or when headlights are on (high beam or low beam). Of course, you wouldn't have the indicator in the dash because you'd be bypassing the main control ECU.

Since the headlight (Auto, Tail, Headlight) are on a separate switch and work in a similar way to fog switch (switch is just grounding whatever pin you select), ​t​​​​here's a few different configs that can be done.

For example, for ppl who already have front fogs already wired up with OEM switch you should be able to tie the rear fog input to Main control ECU to the headlight input. So, if you just want front fogs, then run headlight switch in Auto. If you want front fog and rear fog, then change to Headlight mode. This grounds the headlight input, which would also ground the rear fog input. At least, in theory that should work. Of course that's assuming you implemented the rest of the rear fog wiring.

 

Fantastic! Coming from having many cars with rear fog lights equipped from the factory, this is a very much welcomed mod to my GS.

I may have missed it, but what rear fog assembly are you running? Do you have any daytime pics of it?

 

It's a Whelen Ion DUO in red/white. The same stuff on emergency vehicles. I only got the duo because I figured I could use it as a 3rd reverse light as well. A single color ION would have been a brighter option if only looking at red. This one starts at 9W then quickly drops to 3.8W in steady mode.

Other alternatives are something like a Feniex QSM. That one was actually a little brighter during testing and has more flexibility in mode selection (they have a 100% stead at 9W, a 10% stead at 3W, and a brake pop at 75%). It also has 3 power options so you can do rear fog for 1, reverse for 2, and then maybe a flasher in case you have a roadside emergency for 3

Both lights are SAE certified for emergency vehicle use, so they both have a bright and wide beam. ​​​​​​I ultimately ended up going Whelen as they are a little more durable, and I wasn't fully comfortable having a light capable of doing blue strobes (the Feniex). The Feniex is also a little more "colorful" when off. Plus the universal mount of the Whelen allows for vertical adjustment. Here they are together so you get an idea.


I initially was going to do this from iJDMTOY, but they had only a little more output than the running light and thought that wouldn't be enough. It might be enough for other people. But it's definitely a more clean install. This is the 60 SMD version.


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I don't have yet a daytime shot but here is where I mounted it on the underside plastics near the rear bumper.



I'll try to get a daytime shot tomorrow of it on.


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