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Old 03-15-2012, 12:13 PM   #1
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Major electrical problems. Need some help!

I don't know if anybody is going to be able to help me with this. I think it may be multiple problems.

I have a 2005 Jeep TJ Sport. Inline 6 cyl. Auto, 4x4.

First off, one of the fuses in the engine compartment labeled #26 "Access.2" which is a small 10 amp fuse constantly keeps blowing. I mean the second that I touch a new fuse to the contacts, "POP". So there's a short somewhere. I looked under the dash, moved a few wires around, took the center console out, made sure wires weren't pinched under there, and miraculously, the fuse stopped popping... for about a week and a half. Now it's doing it again. This causes my dome lights, compass and thermometer in the rear view mirror, and my trip odometer all not to work.

Second off, none of my break lights, hazard lights or turn signals work. I checked the fuses and they're fine. I did replace the turn signal 2 weeks ago due to a small short inside of it that had to do with the fog lights turning on and off by slightly touching the turn signal arm. I replace it with a part I found on ebay located here:
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

The part is the exact OEM part that came installed in the Jeep, minus the fog light switch. It seemed to work fine when I first installed it. Now I have no turn signal, hazard lights or break lights.

However, the headlights work when I turn them on, and my rear driving lights turn on as well.

If I remove the 20 pin cable brick that's plugged into the back of the turn signal switch, my break lights still don't work. I'm not sure or not if this cable needs to be plugged in for the break lights to work in the first place though.

This couldn't happen at a worse time. I'm out doing job interviews trying to find a new job, and now I cant take this thing anywhere.

Anybody have any ideas?? I'm desperate here and can't really afford to take it in to have it looked at.

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Old 03-15-2012, 01:20 PM   #2
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check the main headlight switch, if it were grounding out that would cause similar symptoms.

another thing to look at would be the dome light switches in the doors, its not likely but... it came to mind while reading

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Old 03-15-2012, 03:30 PM   #3
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The 26 fuse controls the dome & courtesy lights, the under hood light, the compass/temp mirror, & the B+ to the cluster. You can somewhat isolate where the short is by disconnecting 2 connectors in that circuit. This will work if the short is constant & blows EVERY TIME you put a fuse in. If you find & disconnect the C-300 connector & the short is still there then its in the under hood light or the left dome or courtesy light. If not still there plug the C-300 back in & unplug the C-203 connector. If the short goes away, its in the mirror. If still there its in the right dome/courtesy light or the cluster. Now I mean in those components or the wiring leading to them. The wire you are looking for is yellow/brown from the fuse & past the connectors except the mirror which is pink/white past the C-203 connector.

OK the C-300 connector is a grey 40 pin connector in the left kick panel. The yl/br is 3rd in, bottom row. The C-203 connector is a green 7 pin connector also in the left kick panel. The mirror wire is on one end.

Since moving the wires under the dash affected the short I wound guess the wire going to the mirror 1st then maybe the wire to the cluster.

As to the other problem, I would put the old multi-function switch back in & see if the problems go away. The “new” switch may be bad. Better to have the fog light issue than what you have now. The brake lights are tied to the signals since the signals essentially flash the brake lights in the back. With the connector plugged in, do you have the center brake light working? If so, the m-f switch is bad.

Report your findings & can advise further.
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