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Passenger high beam + light bar not working?

Old 07-01-2018, 07:34 PM
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Year: 2000
Model: Cherokee
Engine: 4.0
Default Passenger high beam + light bar not working?



I have a 2000 Cherokee with a light bar mounted across my front grille. I recently painted the grille pieces and replaced the center piece, so I had to undo the wiring for my light bar. I thought I spliced them back together correctly, but now I have an issue.

The light bar is spliced into the high beam wire for the stock passenger side head light and grounded to the negative terminal on the battery. When the high beams were on, the light bar would turn on with them.

Now, when I turn on the high beams, the passenger side headlight is out (it works on low beam for some reason though?) and the light bar doesnít come on either. Itís almost like I have no juice going to the high beam wire. Is there anything I can check? Iíve already checked the kick panel fuse for the passenger headlight and itís fine. I donít know much about wiring, so now Iím stumped
If someone could help me Iíd appreciate it.

(I can upload some pictures of the wiring to make an easier understanding soon)

Last edited by mikecorrell; 07-01-2018 at 07:39 PM.
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Old 07-08-2018, 07:15 PM
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Year: 1998 Classic (I'll get it running soon....) and 96 (just purchased) and 02 Grand
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Originally Posted by mikecorrell View Post

The light bar is spliced into the high beam wire for the stock passenger side head light and grounded to the negative terminal on the battery. When the high beams were on, the light bar would turn on with them.


That ain't good. The headlight circuit is already running close to the edge of disasterland. Adding an aftermarket device is not smart.

Your problem sounds like a poor connection. How are the wires connected?

Here's what I recommend - lose the current setup completely. Re-wire it correctly. (This might be a good time to add a headlight relay harness. It takes the load off that headlight circuit, which prolongs the life of the headlight switch.)

What does, "re-wire it correctly" look like? You have a relay to power the light bar, and the headlight circuit simply switches the relay. No power from the headlight circuit is used by the light bar.

Pick up a simple 5 pin automotive relay, an inline fuse holder, some wire, and some connectors.

You'll put the inline fuse either on the battery + terminal, or (better), connect it to where the battery connects to the PDC. Run a wire from the inline fuse holder to the relay, which you'll mount in a convenient place near one of the headlights. Then from the relay to the light bar.

To trigger the relay, you'll splice into the high beam wire and run that to the relay, and also provide a ground for the relay.

Refer to this diagram from the12volt.com:

https://www.the12volt.com/relays/relaydiagram47.html

Relay terminal 30 gets power from the battery (through the new inline fuse you installed).

Relay terminal 87 goes to the light bar.

Relay terminal 86 connects to your high beam circuit.

Relay terminal 85 goes to a good ground.


I think rewiring it is very likely to cure your problem, and your light bar will be wired in the right way.


If you can post some pics of your current setup, that would help.
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Old 07-08-2018, 07:37 PM
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Quick update

i just went and did away with the stupid light bar (splicing directly into the headlight circuit was the genius idea of the previous owner). Not gonna pass Pennsylvania inspection like that anyways. Plus I have enough light coming from my 50Ē led bar and 2 pods for off-roading.

I did a temporary splice job to get the wires back to factory... All I did was match the two colors that had been cut. Still a no-go.


Last edited by mikecorrell; 07-09-2018 at 06:39 AM.
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Old 07-08-2018, 07:40 PM
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While poking around I did find this broken ground wire coming off the battery.
That cant be helping me any right?

Last edited by mikecorrell; 07-08-2018 at 07:44 PM.
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Old 07-09-2018, 09:08 PM
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Oh, yeah, that might be a bit of a problem.


How did you do those splices? Please tell me you didn't twist the wire together and tape them.
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Old 07-09-2018, 10:09 PM
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Originally Posted by BlueRidgeMark View Post
Oh, yeah, that might be a bit of a problem.


How did you do those splices? Please tell me you didn't twist the wire together and tape them.
I did do them like that just to test them. Not permanent.
Anyways, thanks for all your advice, I really appreciate it.
I took it to a shop this morning and $106 dollars later, it was a bad headlight connector and the high beam wire was broken way over by the driverís side fender. All fixed now.
Thanks again.
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Old 07-09-2018, 10:19 PM
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Join Date: May 2012
Location: Lost in the wilds of Virginia
Posts: 4,521
Year: 1998 Classic (I'll get it running soon....) and 96 (just purchased) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
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You got off cheap! Electrical work can run up a bill.

Glad you got it!
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