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Old 10-12-2014, 03:07 PM   #1
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Default Jeep won't start. need help

What I'm dealing with:

04 Jeep Grand Cherokee, I6, roughly 150k miles

This is my girlfriends car, and without it she is having to borrow my truck .. So needless to say I need help. She decided to jump somebody off, but let the other person physically hook everything up. Cables were correctly hooked up to her battery, but the open leads were apparently touched together multiple times and maybe even put on to the dead battery backwards (she isn't really sure). After this, the car continued running until it was shutoff, and now it will not start. or crank.

What I've done: battery replaced, old one tested bad. Did not help.
Pulled the alternator, it tested good. reinstalled
Pulled the starter, also tested good and reinstalled. (even tapped on it while trying to start vehicle) Nothing.

The most you can hear when the ignition is turned is a slight clicking noise coming from the starter. Every once in a while it will make a very weak attempt at turning the flywheel, almost as if the battery is dead. But its fully charged.

My question is, can anyone point me in the right direction for further electrical testing? is there any sort of main fuse I should check? My fear is that the PCM is done for. It literally acts as if the battery is completely dead.

Pro tip: dont jump start a car if you don't know how
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Old 10-13-2014, 08:48 AM   #2
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Check the negative cable. It may be dirty or corroded where it's attached to the block.
Also check the crankshaft position sensor.


Another solution, would be to remove both pos. and neg. wires, and replace them with 4 gauge welding cable, and new terminals.
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Old 10-13-2014, 12:04 PM   #3
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Quote:
Originally Posted by Scott'sF150 View Post
Check the negative cable. It may be dirty or corroded where it's attached to the block.
Also check the crankshaft position sensor.


Another solution, would be to remove both pos. and neg. wires, and replace them with 4 gauge welding cable, and new terminals.
Terminals have been replaced. Will check the grounds and crankshaft position sensor. thanks
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Old 10-13-2014, 12:10 PM   #4
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I would inspect and probably replace both battery cables. Negative to the block and positive to the starter. I would suspect the negative first as Scott suggested. When you had the starter checked did it have a solenoid on it and was that checked? The clicking sound typically indicates a weak battery or not enough voltage getting to the starter or solenoid to engage the starter.
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Old Yesterday, 08:38 PM   #5
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Issue was resolved. It was a bad starter. So this goes to show you that *a starter can test good but still be bad*
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