Battery

Asked by GuruBXSJB Dec 23, 2018 at 03:10 PM about the 2008 Jeep Grand Cherokee Laredo

Question type: Maintenance & Repair

My battery light came on while driving,  everything
working.  2008 jeep grand Cherokee

3 Answers
43,870

Hornet_2497 answered 5 years ago

Battery light really means that the alternator is weak or failing. Soon you will have a dead battery so don't turn engine off until you get where you're going. I would head to an auto parts store to have alternator tested, buy a new one, and get home to put it on. You might need a jump start. You might be able to drive an hour or so on battery alone.

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firebird338 answered 5 years ago

Nine times out of ten when battery light comes on the alternator is not charging other one percent blown alternator fuse or wiring problem.

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F_O_R answered 5 years ago

Test the alternator output at the battery. I would want to see anywhere from 13.5 to 14.5 volts. If all you get is 12.5 or less the alternator is not doing anything.

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