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  #13  
Old 11-02-2011, 08:20 AM
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Re: Grand Cherokee Starting Problem Please Help

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Originally Posted by Nick2 View Post
I haven't had a chance to deal with it yet and to be honest, I am having a hard time finding the harness online. Might have to bite the bullet and go to the dealer. It's definitely not the battery, I had it tested and recharged, and it is a less than two year old Interstate MegaTron II battery. I have tested the battery and am getting 12.6 across the terminals after having it charged. i haven't manually jumped out the starter and I am hoping the battery cable is the problem. It does seem corroded inside. the wire itself is whitish and kind of chalky.
If you have a bad cell, you can measure 12V when there's no load. Then when you put a load on the battery, it drops. This is what happened to my wife's Cavalier.

When you say "tested" what type of testing? Did you take it to an auto parts store and have them test it? Or did you simply measure the voltage? When they test it, they will test it under a load. But if you just checked the voltage, that's not really testing.

Have you tried jumping the battery w/ another car? If you can jump the car, it's not the harness and most likely the battery.

You can also take a DMM and measure the resistance from the battery terminal (w/ wires connected) to either the starter solinoid/body (depending on which wire has the corrosion). This will tell you if you're getting a solid connection with the wire.
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  #14  
Old 11-02-2011, 02:19 PM
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Re: Grand Cherokee Starting Problem Please Help

[QUOTE=You can also take a DMM and measure the resistance from the battery terminal (w/ wires connected) to either the starter solinoid/body (depending on which wire has the corrosion). This will tell you if you're getting a solid connection with the wire.[/QUOTE]

Took it to AutoZone and they tested the battery. I have not tested the resistance on the harness itself, but that's a good idea. As far as jumping it, that was the first thing I tried and it was a no go.
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Old 11-08-2011, 12:16 PM
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Re: Grand Cherokee Starting Problem Please Help

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Originally Posted by 2005JGC View Post
No, that further sounds like a circuit integrity issue, check ALL of your large gauge wiring to and from the battery, BOTH ends. I know you said you did, but this absolutely sounds like your issue... even take them all off and clean them at both ends. I guess it may be a starter solenoid, a failing hold in winding, but with everything dying when you turn the key on it really sounds like a bad connection.

I cannot remember if there is space off the top of my head, I know its really tight, but if you can get a jump box lead directly on the starter (+) to the post the large battery cable bolts to, then the ground to the engine then try to start it.
I just wanted to thank you for your help. I jumped the starter like you said and it started right up. I removed some more of the wire from the sheathing and was able to buy a clamp style connector to reconnect it to the battery post. I'll probably end up having to buy a new harness eventually, as the wire was pretty corroded inside, but it is running fine for now. I really appreciate your help. thanks again.
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Old 11-23-2011, 05:46 PM
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Re: Grand Cherokee Starting Problem Please Help

Excellent, glad I could help!
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  #17  
Old 11-24-2011, 09:56 AM
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Re: Grand Cherokee Starting Problem Please Help

Glad you fixed it.
I had this problem on my Crown Vic. I sprayed my terminals and wires with a light coat of WD-40 to keep water away. Its stayed clean now for over a year and no battery problems.
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