Blowing fuses.....why? -
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post #1 of 4 Old 07-14-2005, 10:03 AM Thread Starter
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Join Date: May 2005
Location: Newmarket, Ontario, Canada
Posts: 58
Question Blowing fuses.....why?

Well I thought I had everything electrical sorted out with the jeep, but it turns out not. Earlier I had a problem with my winshield wipers not working, and some weird noise when they were engaged comming from under the dash. I figured out the problem was comming from the fusebox with the small windshield wiper module (I beleive it's called that) having a spark jump between the twopoints on the module. I decided I would touch the two prongs together and not the windshield wipers work flawlessley.

The problem now is that when I turn on the running lights the fuse blows for them. The brake lights wont work or the running lights. I took a look at the fuse and it was a 30 amp in a 10 amp socket ...the original owner must have had some problems too with it.

Does anybody have a clue about what could keep blowing this fuse? The clock goes out for the time the lights do come on (only a short period of time before the fuse goes)

I've been having a ton of electrical problems with the jeep and I'm wondering if it could all be caused from one thing.

Do you think the problem might be because I have bent the windshield wiper module tong things (dont know the name) together permanently?

Hopefully you can help me out....this has been only headaches for me....yikes

'87 XJ...400$ STOCK

Currently stripped down to nothing...
Getting rebuilt slowly but surely...

It's a fixxer upper, but thats part of the fun.
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post #2 of 4 Old 07-14-2005, 10:50 AM
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Join Date: Jun 2005
Location: Northern MA
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I have an 87 too and i have a wire that is a little on the bare side so when im driving down the highway and the rattle starts (need a re-alignment), it shorts the rear-lights and dash-light's out and blows the fuse. You probably have a wire that simply got worn bare and is in permanent contact with some meatl, causing it to short.
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post #3 of 4 Old 07-14-2005, 11:30 AM Thread Starter
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Location: Newmarket, Ontario, Canada
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I was checking all around the jeep at all the wires and I dont know how I missed it before, but this might have something to do with it.

These pictures are taken at the rear left side where the wiring harness comes up from the front.... are they all ground wires?....or wires that the guy had put there to try and solve something??

Cutoff wires...



The mess...

Can ungrounded wires cause fuses to blow?

'87 XJ...400$ STOCK

Currently stripped down to nothing...
Getting rebuilt slowly but surely...

It's a fixxer upper, but thats part of the fun.
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post #4 of 4 Old 07-14-2005, 11:33 AM
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Location: Courtenay, British Columbia, Canada
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i had the exact same problem, mine was this: the previous owner had an electric brake tow lights thing installed. they just used the "place the wires in the joiner and push it closed and it would slice partway through both wires." connectors, and garbage way to, anyways after cracking a taillight i assume that water got in there and over the years cause some shorting out. i went in, cut out the tow package, cut and resodered wires together and shrinkwrapped each wire where that connect thing cut through the electric wire sheath and now its fine.

1990 Jeep Cherokee Laredo
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Dana 30 front, 35 custom rear differentials


RE 4.5" Lift
32x11.50 BFGoodRich M/T KM's
American Eagle 058 Polished Aluminum Wheels, 3.63" BS.
Grand Cherokee Rear Disc Brake setup
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