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Old 03-13-2014, 01:30 AM   #1
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Electrical issue?

Ok so here's my problem...
When I was driving home the other day my battery gauge dropped all the way down and my check gauges light came on. I got home and checked my connections and disconnected my stereo (I have a 2,000 Watt amp and a 12" subwoofer) thinking that may be linked to the problem. I started it and it fired right up and read a healthy 14 volts on the gauge. I let it idle for a few minutes, then when I went to drive it, it dropped down again and the check guard light came on. After playing with it for a while the situation is this: The Jeep starts just fine with no hesitation whatsoever and reads 14 volts on the dash but as soon as I try to drive it or rev it up it drops all the way down and the check gauges light comes on. I've been afraid to drive it that way but I let it idle in my driveway for 20 minutes and it didn't die... Also my battery tested good both with a remote tester and a charger/tester. Also I tested my alternator in the Jeep and pulled it out and bench tested it as well and it passed... What the hell is going on????

Worth noting: I have not had my stereo hooked up since the issue began, and no my battery terminals are not corroded.

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Old 03-13-2014, 01:36 AM   #2
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I would physically remove both battery connections & use a battery brush on the posts and inside of the battery connectors. Then tighten them tightly enough so neither connector can be rotated by even considerable two-hand pressure. Don't just look at the connections and pronounce them as ok, bad/loose/corroded connections can look perfectly fine.

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Old 03-13-2014, 01:43 AM   #3
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Quote:
Originally Posted by Jerry Bransford View Post
I would physically remove both battery connections & use a battery brush on the posts and inside of the battery connectors. Then tighten them tightly enough so neither connector can be rotated by even considerable two-hand pressure. Don't just look at the connections and pronounce them as ok, bad/loose/corroded connections can look perfectly fine.
I always keep my batteries spotless. When I removed the battery for testing I took a wire brush and battery cleaner to my already clean looking connections just to be sure. Also I inspected the cables. Nothing out of the ordinary.
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Old 03-13-2014, 01:51 AM   #4
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Based on that I'd next look at cables themselves and where the other ends of the battery cables connect.
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Old 03-13-2014, 03:10 AM   #5
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Check and clean your solenoid terminals with battery disconnected and starter connections as well ..
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Old 03-13-2014, 11:02 AM   #6
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Quote:
Originally Posted by Jerry Bransford View Post
Based on that I'd next look at cables themselves and where the other ends of the battery cables connect.
X2

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Check and clean your solenoid terminals with battery disconnected and starter connections as well ..
X2 again.
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Old 03-13-2014, 06:27 PM   #7
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Love that oil filter is right above the starter . My oik filter had leaked a luttle oil on the connecter when I pulled it apart it was full of oil .
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Old 03-14-2014, 11:46 PM   #8
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Well I got a new alternator today and it seems to have fixed the problem despite the fact that my alternator tested good both in and out of the Jeep... strange but I'm happy it's resolved. Thanks for the input guys.

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