Fuse blows when I switch the Headlights on. - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 04-07-2008, 07:28 PM Thread Starter
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Fuse blows when I switch the Headlights on.

I need some help, I cannot figure this out. I installed a Painless Wiring harness (not so painless), and I am trying to finish it up so I can get inspected. As of now it seems like I have everything else working properly. Thanks to OIIIIIIIOCJ, 4 wire wiper schematic he posted up. The problem I am running into now is every time I turn the headlights on I blow the fuse. I have unhooked the headlights and it will still blow. I looked at all the wiring and it seems fine, the switch is brand new, I even used an older switch too. It looks as if the old wiring harness had a jumper in the fuse, but I would have thought with a new harness that would have been fixed. Anyone have any idea's?

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post #2 of (permalink) Old 04-07-2008, 07:38 PM
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you have a short to ground.. unhook your headlight.. pull the fuse.. check each side of the fuse.. put the red lead there.. black lead on a grounding point on the jeep... this will get you looking down the right path.. did you check you low/high beam switch?

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post #3 of (permalink) Old 04-07-2008, 07:55 PM
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Pats right. (Oh Lord forgive me for saying that )

Start at the fuse block and trace it back. It can't pop the fuse without a reason.

And on a side note....................

Painless has headlights on a fuse????? Thats different. NO factory wiring does it that way so you don't lose your headlights. They all at least put them on a relay.

I would personally once you find the problem put one (a relay that goes in place of a fuse) in.

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post #4 of (permalink) Old 04-07-2008, 07:56 PM Thread Starter
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yea, i unhooked the high/low and checked it all.

"Pionta Guinness le do thoil. Go raibh maith agat. sláinte."

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post #5 of (permalink) Old 04-07-2008, 08:01 PM
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but you need to check both sides of the fuse.. for the short.. this will get you pointed in the right direction..

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post #6 of (permalink) Old 04-08-2008, 07:01 AM
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I had the exact same problem about a year and a half ago when I put the painless (not so painless) system in my jeep. Every time I hit the headlights the fues would pop. I took the whole thing apart, checked everything 5 times, put it back together and it would still trip. I could not figure it out, it got me so confused that I just walked away and let the Jeep sit for a few days. I came back to it and after even more taking apart, and putting back together I figured it out. The way my universal painless kit was set up was that there were two wires that ran to the front of the auto for the two headlights. There was also one small wire that ran under the dash for the high beam indicator. In my application I was not using a high beam light in on the dash. I took the little wire for the headlight "light" and wrapped it with some other wires I was not using and tucked it away. Turns out that wire was grounding to my firewall. As soon as I insulated it.... the problem was gone.

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post #7 of (permalink) Old 04-10-2008, 04:30 AM Thread Starter
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Thanks for all the help. I found the short and fixed it. It was at the hot to the drivers side tail light.

"Pionta Guinness le do thoil. Go raibh maith agat. sláinte."

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