Updated: 12/23/09Hey, I figured it out a while back, I just wanted to put the correct information here so if anyone is trying to do this, the correct answer would come up somewhere in their search.
viewtopic.php?f=45&t=63132This is how to set up a three (3) position switch.
One is to have the lights come on automatically when triggered by another power source, ie: reverse lights/parking lights.
Two is off all the time
Three is turn them on independently.
On the Switch
- One side goes to fused power
- Middle goes to trigger post 86 on relay
- Other side goes to what you want to tap into (ie: reverse lights)
On the Relay
- 30 goes to fused power (B+ FEED on diagram)
- 86 goes to middle terminal on switch (Trigger on diagram)
- 85 goes to a ground (ground on diagram)
- 87 goes to Aux Lights (ACC on diagram)
This is the
correct Diagram to use with the wires going to where I just mentioned.

Hopefully this helps someone.
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Below is my Original Post, Which is quite confusing, read at your own risk. lol.
Hi, I'd like to apologize in advance if this is clearly explained somewhere, but I have been searching for a very long time and could not find what I am looking for.
I bought a set of fogs and installed them correctly and they work independantly with a switch,
BUT I want to have three scenarios, I know its possible and have read many threads on various websites.
Ideally, I'm looking for a correct diagram in which to accomplish this.
(Here are the three scenarios;
1. I would like to have them turn on automatically with the parking lights so I only have to flip one switch.
2. I would like to turn them on independently.
3. I would like to be able to turn my parking lights without the fogs coming on.
Now I know this is similar to hooking up Aux Reverse lights, and thats the next step, I just want to perfect this one first.
1. I would like to have them turn on automatically when shifted in reverse.
2. I would like to turn them on independently, when camping or working in the dark.
3. I would like to be able to shift into reverse without the Aux lights coming on, like when parallel parking in Manhattan, I dont need anymore attention. )
This is what I am using to accomplish this (or trying to):
I have a standard five pin automotive relay
and
a SPDT CENTER-OFF ROUND ROCKER SWITCH
I've used this diagram
and this one
I've even used KC Lites instructions, but their switch is to just turn the lights on when not in reverse, and doesn't allow for you to turn them on independently
I've read on another site that the correct way to wire the relay is this (which might work withought the ON-OFF-ON switch):
This is the diagram I modified for my application..
Quote:
Run a 12 gauge wire to the battery. Put it on post 30 of the relay.
Post 87 should run to the + side of the lights, and the lights should be grounded.
Post 85 on the relay should get grounded as well.
Then, run a thin, like 18 gauge wire from post 86 of the relay, and splice it on the + side of your OEM fog/reverse lights.
(I know I have an extra pin, 87a, which is always hot, and I've read I can reverse the 30 post and 87a so it won't always be hot, but I haven't gotten that far.)
If someone can help me with a correct diagram, or can label these diagrams correctly (IE: labeling the post number on the relay to where its supposed to go) that whould be amazing.
Again I'd like to apologize if this is simple but I can't figure it out.
Thanks in advance.