Unscewing Bone-head Jump Start Mistake - Jeep Wrangler Forum

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Old 11-08-2010, 04:54 PM   #1
Join Date: Feb 2009
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Unscewing Bone-head Jump Start Mistake

I've been jumping dead batteries my whole life and finally tonight I connected the jumper cables from my perfectly fine 93 Wrangler between the wrong terminals of a dead battery vehicle. As soon as I touched the last cable to the grounding point of the dead battery vehicle, it arced like a big dog. I reconnected the cables correctly and the dead battery vehicle started OK. Now my 93 Wrangler won't start. When you turn the key on, all of the lights look and act normal. But when you move the key to the start position, absolutely nothing happens. No clicking no nothing. The battery acts fine. The volts are good. All of the fuses in my power distribution panel are OK. I switched around the relays trying to rule out the starter relay and they seem fine.

If anybody has any ideas, I'd greatly appreciate them.
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Old 11-10-2010, 11:37 AM   #2
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you need to load test the battery. if it lossed a cell it will still read 12 but wont have the guts to move the starter

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Old 11-10-2010, 05:24 PM   #3
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Also check your alternator. I did that once and it fried the alternator, but luckily in my case it was on an older vehicle so it was only a $30 mistake.

It may be sending a bad signal to your ECM.

After re-reading the original post I see that the starter isn't spinning, so load test your battery then check for electricity at the starter.
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Old 11-10-2010, 06:22 PM   #4
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You could have blown the starter solenoid and/or starter motor.

Once in shop class. I was remove/replacing a starter on a car. Forgot to unhook the battery ground before lifting the car, and was unhooking the starter leads when the end of my rachet hit the ground lead while I was disconnecting the hot lead. The light show was pretty impressive needless to stay. Ended up welding the inside of my rachet, blowing up the solenoid and burring up the starter drive motor.
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Old 11-29-2010, 06:44 PM   #5
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Thanks for the tips. While monkeying around and experimenting with making the starter go by jumping the two solenoid terminals with a screwdriver, I got the starter to turn and fire the engine. I soon turned the key off and tried starting it again using the usual key start which worked and has worked every time ever since. I'm not sure what was stuck or locked up before but I'm back in good shape now.
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Old 11-29-2010, 07:15 PM   #6
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Don't connect the jumpers with your engine running. Check into it
2004 Black X 4.0, auto, 3.73's, soft top 31-10.5-15 Toyo A/T's on 8" Ultra 175's, 2" Teraflex BB.
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Old 11-29-2010, 07:24 PM   #7
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Check into your starter

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Old 11-29-2010, 09:24 PM   #8
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lol those stupid power pack things are worth it lol
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Old 11-29-2010, 09:50 PM   #9
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Also never make the last connection to the battery terminal. The last connection should be a ground connection away from the battery.


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