Adding a light bar to turn on with led fogs

stimleck

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Hello, is it possible to connect my small light bar to turn on with the factory led fogs? I would prefer to not add a seperate nswitch. Than k you in advance





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roaniecowpony

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Yes, of course.
I had my wide beam driving lights on my truck wired to come on with the fogs.

You can do it a few ways.
1) if the fog light circuit has the capacity, you can hook them directly into that wiring.
2) a safer way may be to run a relay off of the fog light circuit, so it energizes the relay when the fog lights are turned on, then the relay provides the bridge between a 12v power source (an unused factory fuse panel circuit is common) and the light bar.
3) (My favorite method) run a wire off of the high beam circuit to a relay which powers the light bar, but put another relay in the same power wire between the light bar and power source, where this relay is switched by an aux switch. What this does is allows you to use your high beams with or without the light bar, but when the high beams are switched to low beams, the light bar also shuts off. Very useful to shut off high beams and any high powered lights with one motion of switching to low beams.
 

roaniecowpony

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Keep in mind when using the factory fog light circuit as a relay trigger or power source, that fog light circuit is disabled when your high beams are switched on. So, when you go to high beams your light bar would shut off.

I believe the Tazer has a selection to fix the fog lights shutting off when high beams come on.

The better solution is to wire per 3) above. Alternatively, if you really don't want to add a switch, you can simply use one relay tripped by the high beams to turn the light bar off and on.
 
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stimleck

stimleck

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thanks for the guidance but to confirm the stock fogs and head lights are the oem led lights, will the methods described above work with led's?
 

roaniecowpony

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thanks for the guidance but to confirm the stock fogs and head lights are the oem led lights, will the methods described above work with led's?
Yes. You'll probably want your light bar to work when your high beams are on. Using the fog light circuit won't allow your light bar to be on with high beams, unless you have a Tazer and select that change.
 

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