All-On Mod Tinkering, Pics.

[SparkZ03DMAX]

Well I never did find out how to keep the fogs on with the Hi Beams on, but I did a little trick. A buddy told me to run a wire from the 86 pin of the Headlight relay to the 86 pin in the Fog relay. This kept the fogs on with the high beams, but you're unable to turn the fogs off. I did it for a quick photoshoot, but would like to find out more about finding a safe way of doing it. Other than that, the 01-02 All On mod works great with my new HID Hi Beams. Open for ideas.

 

[Chevy1925]

deleted to keep someone from burnin something up

 

[Chevmeister]

Both of the wires in the b5 positions are neg, problem being is the orange wire is the momentary trigger, by doing this best case is your fog lights change state every time you turn high beams on or off. worst case you nuke your BCM.
The purple wire kills the circuit inside the BCM that controls the fogs. If you were to place a diode between B5 and A7 of the C2 connector you would have fogs on with high beams all the time.
If you had a latching relay that had a single momentary input that controled the output you could break out C3 B5 as your momentary trigger, and control the state of C2 A7 between (-) and open, your fog light switch would work even when the high beams are on. Of course this requires either cutting wires to the bcm, or pulling the pins out of the connectors and tapping the wire. The biggest problem is finding a latching relay that works in this situation. Duratothemax could probably build this in his sleep, me I just had something laying around that happened to work.

 

[Chevy1925]

wow, been a long time since i looked at that shematic but yup your right though the b5 on teh C2 does carry voltage when the highs are activated. my test light and a few sparks showed that lol.

if you cut the B5 purple wire in the C2 connector, your fogs will work off the factory fog switch whether you activate the highs or not. problem is, if your auto headlights come on, the high beam indicator comes on and stays on. if you manually turn the headlights on, the high beam indicator will not work no matter what. i could not find the highbeam indicator wire but i think i was told a long while back it was activated by the gauge cluster processor.
basically, there is no easy way in doin it
btw, i deleted my top post so no one trys my route. it will fry stuff

 

[Chevmeister]

High beam indicator is class 2. Cutting the indicator wire is not reccommended, but it would work.

I found a $25 solution that should work without any ill effects. As soon as I get my paypal straightened out ill give it a whirl unless any brave soul wants to try it for me.

Ive found that 1967-71 VWs use a high beam relay ***941583. Basically its a momentary triggered latching relay. It could be used to replace the BCM and should give you the ability to have your fogs stay in whatever condition they were left. if anyone want to try it get the relay, make sure 30 and 85 are not internally jumpered, or it will not work, some models are. Connect 30 to a positive source, 85 to a ground. connect your wire you removed from C2 A7 to either 85a or b, and connect the wire removed from C3 B5 to S on the relay. As long as your parking lights are powered, the fogs should be in the last state you left them.
If I can get one of these relays and get my fog lights replaced (both lenses are gone) ill switch it in and see how it works.

The same relay was used in alot of VW and Audi cars into the 1990s so its still available.

 

[SparkZ03DMAX]

Wow....lol. Sounds like Chinese to me haha :roflmao:

 

[Chevmeister]

Would it help if I draw a picture? LMAO
It's not as difficult as it sounds. Once I have it working I'll elaborate, pictures, really bad drawing done in mspaint, the usual.
Not to derail, but who makes your grill, It really sets the truck off.

 

[SparkZ03DMAX]

Not sure. It was on the truck when i purchased it a long time ago

 

[Chevy1925]

Would it help if I draw a picture? LMAO
It's not as difficult as it sounds. Once I have it working I'll elaborate, pictures, really bad drawing done in mspaint, the usual.
Not to derail, but who makes your grill, It really sets the truck off.

question. why not cut and ground the orange b5 wire in the C3 connection and the drk green/white wire in A7 on the C2 connection? this would put the fog light on a separate circuit of the BCM wouldnt it? only thing i see making them run different is the fog light relay will click on when ever the park lamps are turned on but it wont turn the fog lights on till the switch is pushed. i doubt longevity of the relay being on will be an issue as they will only be on as long as the park lamp relay which that relay probably has many more hours than the fag lamp relay and is still kickin (well on most trucks). im sure i missed something that mitchell doesnt show though cause i know you've done your homework too

 

[SSchmi5519]

deleted to keep someone from burnin something up

:thumb:

 

[Chevmeister]

question. why not cut and ground the orange b5 wire in the C3 connection and the drk green/white wire in A7 on the C2 connection? this would put the fog light on a separate circuit of the BCM wouldnt it? only thing i see making them run different is the fog light relay will click on when ever the park lamps are turned on but it wont turn the fog lights on till the switch is pushed. i doubt longevity of the relay being on will be an issue as they will only be on as long as the park lamp relay which that relay probably has many more hours than the fag lamp relay and is still kickin (well on most trucks). im sure i missed something that mitchell doesnt show though cause i know you've done your homework too

the reason why not, is it doesnt work that way. the orange wire is the input, when you push the button it momentarily goes (-). the green wire is the relay control wire. when it get ground the fog light relay is engaged. if you ground the green wire the fog lights come on with the parking lights and the switch is just ornamental. The BCM actually recieves a momentary signal from the fog button through the orange wire, and actuates the relay with a constant (-) output at the green wire.

Mitchell does a lousy job with how the control systems work. you need GM eSI to get a good grasp on it.

 

[SparkZ03DMAX]

Well whoever wants to test it on their truck let me know haha. I'm scared to lol