Alternator Output Question -
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Unread 03-06-2014, 10:22 AM   #1
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1994 ZJ 
Join Date: Sep 2007
Location: Bloomington, Illinois
Posts: 125
Alternator Output Question

So about two weeks ago, my battery died. It was a solid 3 years old, about 6 months outside of the warranty, and didn't have enough amperage to crack over a Cheerio.

Cheap Farm & Fleet battery got replaced with a yellow top Optima, its awesome, I should have gone with an Optima years ago.

However the alternator is putting out 14.8 volts now (it did not seem high when I had the old battery, but I drive the jeep like once or twice a month). Based on the temperature, the FSM says 13.7-15 volts is acceptable. I personally, still think this is to high, I've always been under the impression anything above 14.4 is too high.

Is this true, or am I worrying about .4 volts for nothing?

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Unread 03-06-2014, 04:18 PM   #2
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1995 ZJ 
Join Date: Feb 2012
Location: St Pete, Florida
Posts: 1,929
be careful with the optima batteries, they are very picky about how they are charged. It's still within safe voltages but food for thought.
1995 ZJ ltd, 4.0 i6, *cough stock cough* 253,xxx and still pumping strong
1998 Chevy Cheyenne K1500, 5.7L Vortec, mostly stock
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