I have a 2001 Jeep Grand Cherokee Laredo, and I can't get the battery to keep a charge.

40

Asked by Jun 22, 2014 at 12:45 PM about the 2001 Jeep Grand Cherokee

Question type: Maintenance & Repair

I've had the battery tested, and it is
fine. The alternator has been tested
too, and it is running low but should
still be fine. I had the terminals
replaced, and there isn't corrosion on
the battery.

7 Answers

117,985

Alternator has to be putting out around 14.5 volts to keep a battery fully charged.

1 of 1 people found this helpful.
40

The mechanic said it was putting out 13.8, would that small of a difference cause my battery to discharge rapidly?

1 of 1 people found this helpful.
117,985

That's mighty close. Does it discharge over night or while you are driving?

1 of 1 people found this helpful.
40

It discharges overnight.

1 of 1 people found this helpful.
117,985

www.youtube.com/watch?v=zdIKNnwEjIs -- check this out. Shows how to test for parasitic draw. You probably have something staying on draining the battery over night.

2 of 2 people found this helpful.
117,985

Do you leave a cell phone charger hooked up or any other after market item plugged into cig lighter over night? If so that's probably your drain.

1 of 1 people found this helpful.
40

Thanks, I'll definitely try that out! Nope, I always unplug my phone charger.

2 of 2 people found this helpful.

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