Wire aftermarket fog lights to Headlights - Jeep Renegade Forum
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post #1 of 13 (permalink) Old 07-08-2019, 08:17 PM Thread Starter
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Wire aftermarket fog lights to Headlights

I have 3 fog lights attached to my bull bar that have a push button that I ran into the cab of my Renegade.
I've more than once drained my battery forgetting to turn them off.
Is it possible to wire them to the headlights exclusively

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post #2 of 13 (permalink) Old 07-08-2019, 08:44 PM
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why don't you change the button to one that has a light on it ??
i would check to see how much amperage increase would be to the head lights wiring. would probably have to increase the fuse size also. doing this means the fog lights are on at the same time the headlights go on, this what you looking for?
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post #3 of 13 (permalink) Old 07-08-2019, 10:50 PM Thread Starter
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It has a light

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post #4 of 13 (permalink) Old 07-09-2019, 01:05 AM
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Originally Posted by jeff1 View Post
would probably have to increase the fuse size also.
No. Don't do that unless you want to melt or burn up the wiring. The fuses are rated for maximum amps for any particular circuit.
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post #5 of 13 (permalink) Old 07-09-2019, 01:18 AM Thread Starter
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No. Don't do that unless you want to melt or burn up the wiring. The fuses are rated for maximum amps for any particular circuit.
How would I go about wiring the fogs to the headlights, so they turn on and off with them?

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post #6 of 13 (permalink) Old 07-09-2019, 01:19 AM Thread Starter
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why don't you change the button to one that has a light on it ??
i would check to see how much amperage increase would be to the head lights wiring. would probably have to increase the fuse size also. doing this means the fog lights are on at the same time the headlights go on, this what you looking for?
It is what I'm looking for, I'd like for them to turn off and on simultaneously

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post #7 of 13 (permalink) Old 07-09-2019, 03:15 AM
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Regards loads you can just use a relay to operate in series with your existing fog light wiring, so the relay enables/disables them and the button controls them.

It can be tricky to use the headlights since they are usually 2 or more circuits for dip and main with control via electronics, so there may not be a 'headlight' wire to pick up.
For what you describe I'd just run the relay from an 'ignition' feed, so when you turn the car off the relay drops out and kills the fogs. Battery saved
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post #8 of 13 (permalink) Old 07-09-2019, 01:00 PM
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I'll second mike in dp.

The way to do it is keep you switch, but wire in a relay so that the relay switch and manual switch are wired in series. I.e. both have to be closed for power to reach the fogs. Then pull signal for the solenoid from a switched wire or fuse socket.

This way they obey your interior switch, but shut off with the ignition.

Make sure you get a relay rated for enough amps to run the lights.


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post #9 of 13 (permalink) Old 07-09-2019, 04:50 PM
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It is what I'm looking for, I'd like for them to turn off and on simultaneously

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just splice in the hot side of the fog lights to the hot side of the headlight near the plug. i think you will smell wires burning when you turn them on---pretty sure you will over load the circuit
I would just move the existing switch higher on your dash, already wired in and working well. you could turn off your headlight delay time to zero then you would know they are on
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Last edited by jeff1; 07-09-2019 at 04:58 PM.
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post #10 of 13 (permalink) Old 07-09-2019, 05:08 PM
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I'll second mike in dp.

The way to do it is keep you switch, but wire in a relay so that the relay switch and manual switch are wired in series. I.e. both have to be closed for power to reach the fogs. Then pull signal for the solenoid from a switched wire or fuse socket.

This way they obey your interior switch, but shut off with the ignition.

Make sure you get a relay rated for enough amps to run the lights.
good answer--- not for the novice
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