Battery drainage
#1
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Join Date: Jun 2013
Location: Nebraska
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Year: 1997
Model: Grand Cherokee
Engine: 5.2 V8
Battery drainage
So I've been at this for about a month now... I thought I figured out what was draining my battery. I came to the conclusion after checking fuses ect that it was the factory amp and its apart of the cluster fuse. With the amp plugged in I tested to see what it was pull in and it was .7 so I unplugged it and it dropped to round .1 but I had no sounds obviously so I bypassed the amp and made splices ect and now my system works. And I Thot I figured it out cuz the battery would die over night and it didn't after I reconnected it all.(huzzah) but I didn't run it for 3 or 4 days and it was dead... Idk what else to try. Interesting note tho the flip solenoid fuse is pulling 4.2? I'm not sure what that even is. If anyone has a diagram as to what the fuses protect and where the devices go? Like Idk what the cigar fused circuit is. Any thought or ideas are greatly appreciated!!
#2
Old fart with a wrench
Okay, according to my 2000 WJ Owner's manual, the cigar lighter is fused 15 A and the power outlet is fused 20 A. Try checking the amp draw at the battery with the key off. It shouldn't be pulling more than 2 amps for memory. If it's pulling more, try disconnecting the alternator. Occasionally, a bad diode trio will keep the field energized even when shut down.
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