Location of High Beam relay

mass-hole · **Posted:** Sat May 14, 2016 12:23 pm

Does anyone know which relay behind the dash is for the high beams. I am trying to wire in my LED light bar to turn on with the highs.

Either that, or do you know which wire from the steering column is from the high beam switch.

mass-hole · **Posted:** Sat May 14, 2016 2:43 pm

I did figure out that pin 7 on the plug in the back for light stalk is for the high beam. unfortunately the lightbar relay is sending power back through the trigger wire so that the high beams do not turn off with the stalk. You have to pull power from the relay to get the highs and the light bar to turn off.

McTudor · **Posted:** Mon May 16, 2016 9:23 am

If you are looking for the light bar to come on at all times with the high beams you can do all of the wiring under the hood. I just tapped the relay coil wire off of the high beam power wire at the light socket and grounded the other side of the relay coil to the frame. The relay draws very little load which will not effect the high beams.

I only modified the stuff behind the dash to get the roof light indicator to light up and wire a separate switch for control.

LibertyFever · **Posted:** Tue May 17, 2016 1:29 am

I have my driving lamps wired to come on with my high beams.
I tapped into the wiring harness at the headlight to provide +12v to the auxiliary lamp relay. Then I ran a ground line from the same relay to my dash to a switch. Throw the switch, ground the relay, auxiliary lamps on.
Super simple.

However due to the daytime running light feature of my Jeep should I have the auxiliary lights switched on and the headlights switched off there's a small amount of voltage across the relay causing it to chatter.

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WWDiesel · **Posted:** Tue May 17, 2016 10:48 am

mass-hole wrote:

I did figure out that pin 7 on the plug in the back for light stalk is for the high beam. unfortunately the lightbar relay is sending power back through the trigger wire so that the high beams do not turn off with the stalk. You have to pull power from the relay to get the highs and the light bar to turn off.

As others suggested, tap into high beam wire under hood, add a fuse, power relay, and a cutout switch on dash so you can deactivate the light bar when you do not wish for it to come on with the high beams.
I have this wiring setup on my Jeep CRD and it works perfectly!!! :wink:

Here is a wiring diagram, in your case the driving lights will be your light bar:

LibertyFever · **Posted:** Thu May 19, 2016 10:50 am

Nice schematic WWDiesel

What I did with my setup was run the fused 12v from the OEM High Beams directly to the relay. Then I ran the relay ground behind the dash, one wire, to the switch then chassis ground.

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WWDiesel · **Posted:** Thu May 19, 2016 11:12 am

LibertyFever wrote:

Nice schematic WWDiesel
What I did with my setup was run the fused 12v from the OEM High Beams directly to the relay. Then I ran the relay ground behind the dash, one wire, to the switch then chassis ground.
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Yes that will work as long as you do not use a switch with an internal LED indicator light like I installed. Those will not function correctly on the ground side of a circuit... :wink:

mass-hole · **Posted:** Thu Jun 09, 2016 3:31 am

That is what I ended up doing later that day. I was trying to wire it like the fog light mod was done. One thing I did find out was that the high beam trigger is opposite what you would expect, when you turn on the highs, the wire coming out of the stalk goes to 0v.

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Location of High Beam relay

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