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Unread 07-03-2013, 10:22 AM   #1
robertsk1
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1997 TJ Wrangler 
 
Join Date: Jul 2013
Location: Stafford, CT
Posts: 18
Startup Issue??

Hey guys, new member on the forum here after many months of crawling all over it. So I'm having a bit of an electrical gremlin. I have a leaky gas regulator on the fuel pump, so whenever I start the jeep cold, I turn the key to ON, then OFF, about 3-4 times to get gas back in the system. The jeep usually turns over without issue. Well about 3-4 days ago, the jeep refused to crank, (in the parking lot 20 miles from home, figures). I narrowed it down to a corroded connection between the battery cable and the PDC fuse box under the hood. I cleaned that connection and it started right up.

Well this morning, I did the usual key on/off deal, my dash lit up like normal, the jeep beeped at me to tell me the keys where in the ignition, go to crank, something like a 'thunk" and then nothing. Tried to turn it again, nothing, and my dash lights were barely flickering. Put a volt meter to the battery, 12-14 volts (I have an old meter not very accurate). Volt meter to the PDC post, same reading. So I had my father turn the key while I listened under the hood and there's a buzzing coming from the fuse block under the hood.

Didn't have time to jump it or check which relay it was, I was late for work as is. My suspicion is that the battery can hold a charge, but can't take a load.

Any thoughts? I have a 97 wrangler, 4.0. I appreciate any insight you may have

Thanks in advance

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Unread 07-03-2013, 10:40 AM   #2
JeffBowser
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1997 TJ Wrangler 
 
Join Date: Oct 2010
Location: SE Florida, Florida
Posts: 1,562
I'da taken a voltage reading while he turned the key. Battery is a good place to start, these things can't run without a good battery.
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Unread 07-03-2013, 10:43 AM   #3
robertsk1
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1997 TJ Wrangler 
 
Join Date: Jul 2013
Location: Stafford, CT
Posts: 18
Quote:
Originally Posted by JeffBowser View Post
I'da taken a voltage reading while he turned the key. Battery is a good place to start, these things can't run without a good battery.
PO said battery can't be more than two years old. So it seems unlikey, but not impossible. However the dash lights being dim after trying to crank would be a symptom of the battery not being able to handle the load, correct?
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Unread 07-03-2013, 10:47 AM   #4
JeffBowser
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1997 TJ Wrangler 
 
Join Date: Oct 2010
Location: SE Florida, Florida
Posts: 1,562
That's my line of thinking, along with that buzzing. The "thunk" is a wild card, I don't know what to make of that, but testing the battery is certainly the first place I'd go.

Quote:
Originally Posted by robertsk1 View Post
PO said battery can't be more than two years old. So it seems unlikey, but not impossible. However the dash lights being dim after trying to crank would be a symptom of the battery not being able to handle the load, correct?
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Unread 07-03-2013, 01:13 PM   #5
NotURMailman
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2005 TJ Wrangler 
 
Join Date: Nov 2006
Location: 'Round Here, Florida
Posts: 5,855
I would guess weak battery.

The "thunk" was probably the bendix engaging the flywheel, just not enough juice for the starter to actually turn the engine over.
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Unread 07-03-2013, 05:57 PM   #6
robertsk1
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1997 TJ Wrangler 
 
Join Date: Jul 2013
Location: Stafford, CT
Posts: 18
In case anyone was wondering, I cleaned the connections on the battery terminals, the starer, and the engine ground and it fired right up. Hopefully that does it.
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