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Old 06-11-2005, 05:09 AM   #1
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Default Got some grill lights, Now how do I use it with a switch?

I got these little lights to put in my grill

Now how do I use it with a switch?

I remember a few years back my friend got some fog lights for his car and ran the power off the battery with a switch. I forgot how he did it though.

BOth of the little lights have a positive and negative wire. So now what?

And while Im here is there a way I can use it with the fog lights?

Is it possible to just expose the foglight wiring and just share the power with that?
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Old 06-11-2005, 09:39 AM   #2
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What is the wattage of the lights??

For the purpose of this post, I'll assume that they are 55w each. So first... some math.

55w + 55w = 110w
110w / 12v = 9.167A

The math above shows that the lights will be consuming roughly 9 amps when they are on. I would not recommend directly attaching to your fog light circuit as the wire gauge and fuse will not support the additional drain. However, you can use the fog light circuit to trigger a relay in order for the new lights to operate at the same time.

If you are famaliar with a standard automotive relay, you will know that the 5 pins are labled 30, 85, 86, 87, 87a. I'm not at the computer that has software to draw schematics but this is the text version:

85 - switched ground from interior mounted switch
86 - connect to factory fog light wire that shows +12v when on
30 - +12v output to both new lights
87 - 10 apm FUSED input from battery
87a - No connection

Both lights would have to be chassis grounded.
The interior switch can be any ON/OFF switch such as a rocker, illuminated rocker, push-in, ect. there are no special requirements for the switch as it will be a low current application.
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