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Unread 05-29-2009, 01:39 PM   #1
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Join Date: Sep 2008
Location: EDH, Ca
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Electrical Problem 97 TJ

I started my jeep in the garage. It started fine. I pulled it out and moved it to air my tires up, then nothing. I couldn't even get a noise out of it. The dash lights wouldn't come on. I put a charger on it and tried to start it, still nothing. After a short charge, I would turn the ignition and hear the fuel pump go on, but still wouldn't start. I touched a wire from the battery to the starter and the jeep tried to start. It turned over, but would not start. I tried to start it with the ignition again, but this time, no fuel pump. The fuel pump wouldn't go on. I pulled the fuel pump relay and replaced it. Same problem. I jumped the relay by connecting wire and could make the fuel pump go on manually. I could even make the ignition click. With those jumped, I could then start the jeep. But, when I turn the key off, it stays running. I have to pull the relay jumper wires to kill the motor. I hear that there are tests to run to diagnose whether it is a broken wire or a bad PCM.

Has anyone had this issue? Could a bad battery cause these symptoms?

Any help would be appreciated.

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Unread 05-29-2009, 02:43 PM   #2
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Location: Virginia
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could be the battery cables. check them and make sure they are not corroded inside the cover and that they are tight.
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Unread 05-31-2009, 10:58 PM   #3
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2006 LJ Wrangler 
Join Date: May 2009
Location: SE Michigan
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check ALL your fuses and battery cables. double check the chassis grounds. sounds like when you installed the "jumpers' you were back feeding the ignition system and thats what was keeping on the jeep with the key off.. if its not battery/cables related, my first educated guess is theres a problem somewhere in the ignition circuit, maybe a main fuse, possibly the ignition clyinder could be bad. get a multi-meter. start there.
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Unread 06-08-2009, 11:32 AM   #4
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I've narrowed it down that I'm pretty confident that it is ignition related. I believe that it could be the ignition cylinder. I am going to check that next.

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