Ok, i have seached and searched and have found a few things on this, and tried it and didnt work, so i tried it a different way, and it didnt work. so now im asking again. how do you do the all on headlight mod? i got all the diods made up with enough wires, and know to use the 85 pins, and all that, just couldnt get it to work. all i want is to be able to turn my High Beams on, and keep my lows and fogs on. but still have full use of my fogs alone, and lows alone, and if possible, just highs alone. thanks in advanced

If you use the diode to jumper between the 85 pin of the lowbeam relay to the 85 pin of the highbeam relay, you'll retain the switched option of your fogs. If you jumper the 85 pin of the fog relay, you lose interior switch function - or, at least I did. I left the fogs original.

Someone else might have better info than I, though...

I just got one of these:http://www.innovadd.com/bb.main.html

Jimmy, give me a call and I'll walk you through it. Check your pm's.

Also, here's a diagram. This thread explains it more in detail.

http://www.dieselplace.com/forum/showthread.php?t=179827

wont this make the head light wiring in the dash get hot is there a way to do it with a relay and getting battery power directly to the headlights

wont this make the head light wiring in the dash get hot is there a way to do it with a relay and getting battery power directly to the headlights
No... this is done to the low and high beam relays. The headlight and dimmer switches are low amp 'triggers' for the relays in stock form. Cheers.

okay perfect thanks for the help

Will this work on the LMM?

Thanks.

Your LMM already has low beams when you turn on your highs...Havent you noticed?

All you'd retain is your fogs. And no, this will not work for an LMM. There are other ways to do it.

Your LMM already has low beams when you turn on your highs...Havent you noticed?

All you'd retain is your fogs. And no, this will not work for an LMM. There are other ways to do it.

I would like to keep my foglights from switching off when I hit my highbeams. I'll be honest and tell you I haven't searched yet (being at work right now and trying to fly under the boss' radar). But if someone wants to guide me in the right direction it would be much appreciated....;)

Ok lets get this in simple form… Each relay has a trigger point.. it’s pin 85.. When power is put there on the pin the relay moves and allows the power to flow to lights it powers. So if you put a diode between to relays at pin 85’s on each the diode lets the power from one flow to other and turn the other on as well, but not in both directions because a diode is like one way valve.

Fog to low beam diode

If you don’t have any lights on and you push the fog switch works as designed. Once it connected to the low beams with a diode it will turn with the lows with out the switch.

If you put a second diode to from the high to lows

The fogs will again work with the factory switch with the lights off.
With the lows on the fogs will automatically turn on.
The High beams will keep on the lows beams and the power will also flow to the fogs and keep them on a well..

Also, here's a diagram. This thread explains it more in detail.

http://www.dieselplace.com/forum/showthread.php?t=179827

i did it like this, and when i turned my fogs on, my lowbeams and fogs, and daytimers were on. :confuzeld?? was really confused. i took it out and havnet had time to try it in the past 2 months

Smokin, PM'd you. I can make it plug and play for you.

Jimmy,

Couple things...
1. Are you sure the bottle-cap ends on the diodes are pointing in the right direction, this would cause a similar reverse action.
2. Double check what pin is being used, GM may have the relay in "backwards" so just make sure its the 85 position.
3. Make sure your wire is not touching any other pin on the relay.

These may sound a little stupid but ive done some of these same things before before...

If you can make sure everything above is checked out o.k. then we can see whats going on!

Good luck

I think there are several different methods in the thread that Unit posted. I remember reading many pages of it when I did mine. I have mine so that the lows and fogs work as normal but when the highs are on they all come on. I know there is a diagram in that thread somewhere but I don't have time to look thru all that right now, as I am supposed to be working. Damn this addicting site!

Jimmy,

Couple things...
1. Are you sure the bottle-cap ends on the diodes are pointing in the right direction, this would cause a similar reverse action.
2. Double check what pin is being used, GM may have the relay in "backwards" so just make sure its the 85 position.
3. Make sure your wire is not touching any other pin on the relay.

These may sound a little stupid but ive done some of these same things before before...

If you can make sure everything above is checked out o.k. then we can see whats going on!

Good luck

almost positive that i had it correct. when i get sometime i will try it again. been with my girlfriend every second of everyday haha

Jimmy,

Couple things...
1. Are you sure the bottle-cap ends on the diodes are pointing in the right direction, this would cause a similar reverse action.
2. Double check what pin is being used, GM may have the relay in "backwards" so just make sure its the 85 position.
3. Make sure your wire is not touching any other pin on the relay.

These may sound a little stupid but ive done some of these same things before before...

If you can make sure everything above is checked out o.k. then we can see whats going on!

Good luck

Thanks andy. almost positive i had it correct, when i get sometime i will try it again. been with my girlfriend everyday haha

Jimmy,

Couple things...
1. Are you sure the bottle-cap ends on the diodes are pointing in the right direction, this would cause a similar reverse action.
2. Double check what pin is being used, GM may have the relay in "backwards" so just make sure its the 85 position.
3. Make sure your wire is not touching any other pin on the relay.

These may sound a little stupid but ive done some of these same things before before...

If you can make sure everything above is checked out o.k. then we can see whats going on!

Good luck

Thanks andy, im almost positive i had it correct, when i get sometime, i will try it again, been with my girlfriend everyday lately haha

I did this two days ago. Not sure why I didn't do it before, it's so easy! One thing, make sure you use the 85 pin according to the diagram on the cover, NOT on the relay! The relay may have been in backwards as was mentioned. Also the 85 pin is in a different position on the fog lamp relay vs. the other two. I ran the diodes from low to high and fog to high, bottle cap facing high, 85 pin on all.

What are y'all using to tap into the 85 relays...fuse taps or just stuffing the wires in there?

And I'm guessing that, since I have no fogs, I can just run the highs to the lows and have all on? Or is that backwards?

I took and opened the relays up and soldered to the inside of the plastic case. Drilled a hole in the top of the case and then feed the wire through that to the diode, soldered that in place and put shrink over the top of it. Makes everything nice and clean looking and only took about twenty minutes.

I just wrapped the ends of the diode around the pin tight and pushed it back in. Been working for a year or so now.

about how much are the diodes

Like a buck or so at Radio Shack

thanks very much 13fox

is there a part number that we need to use.

thanks very much 13fox

is there a part number that we need to use.

I did an extensive write up here, as posted a page or two back in this thread:

http://www.dieselplace.com/forum/showthread.php?t=179827

In there, are several ways of doing this, one with fog light controls and the other with low beams/fog lights as one package deal. Either way you do it, when you turn on your highbeams, you'll get everything and you've now created your very own super nova...

Diode part numbers are 4001, 4002, 4003 and 4004. I dont remember which ones in particular that I used but I wanted the longest ones available.

Where can I find some fuse taps? I have looked at the local Radio Shack, Autozone, Carquest, and O'Reilly's.

Found some on-line at Radio Shack. Called my store with the part number and they NOW they said they had them. Guess I'll make a trip back to the store.

Found some on-line at Radio Shack. Called my store with the part number and they NOW they said they had them. Guess I'll make a trip back to the store.
Shouldn't use a fuse tap..

I like this diagram.... Works like a champ.

http://www.dieselplace.com/forum/attachment.php?attachmentid=45676&d=1190090545

Also, here are the part #'s for the diodes from Rat Shack (1N4001 diode or a 1N4004 diode)

Just did it, works great!

Question, my hi beam dash icon works with the FTP but not when I have the hi's on. Is this normal? I don't really care just an observation. Same with the fogs, now that I think of it. The dash icon works when I just have the fogs on with the lows, but not when the hi's are "all on".

Anyways, can't wait to make a decision on some HID's.

Shouldn't use a fuse tap..

Why not?

I went from fog to low and low to high with bottle caps of the diodes facing the same direction ... My fogs stay on the whole time with my lows and im still able to turn my highs w/ all on @ one time.

Why not?
Don't need to?

I went from fog to low and low to high with bottle caps of the diodes facing the same direction ... My fogs stay on the whole time with my lows and im still able to turn my highs w/ all on @ one time.
is that the way you wanted it?

Less than $1 and 30 seconds!!! I just installed the diode by pushing it in the pin pocket with the relay and it's kinda hidden under the relays, no extra wire needed.

Oh and the IN4001 and so on numbers are not radio shack part numbers, I liked to never found the correct part. The RADIO SHACK part number is 276-1103 (for the IN4004).
Look at the top left corner of the package in this pic.............http://www.dieselplace.com/forum/attachment.php?attachmentid=73623&d=1223424503

Guys,

I have an 04 Buick Lesabre that I would like to add this mod to.

Does anyone know if it is done the same?

Guys,

I have an 04 Buick Lesabre that I would like to add this mod to.

Does anyone know if it is done the same?

I would start by comparing the fuseboxes .... how similar are they?

Well, I tried it (pin 85 to pin 85) and it didnt work on the Buick. The relays are different, (8567)?

Has anyone done this on a GM car?

I did the headlight mod on my 02, but I also want to have my drl's stay on also. How do I do this?

Here is the under dash mod
http://www.dieselplace.com/forum/showthread.php?t=276754&highlight=Headlight+Mod