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Ask sprinkles08 Your Own Question
sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 21432
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Customer Question

Submitted: 2 months ago.
Category: Car
Customer: replied 2 months ago.
2012 jeep cherokee 3.7 alternator not charging
Expert:  david craig replied 2 months ago.

Hi David here, dont know why you are posting 4 of the same questions.........

I need you to check the voltage at the large cable on the alternator while the vehicle is running. let me know the results and we can go from there. Thanks.

Customer: replied 2 months ago.
10 volts while running at large cable . Lost connection sorry.
Expert:  david craig replied 2 months ago.

ok. there is only 2 possibilties here. you put a bad alternator in or the drive belt is slipping and not turning the pulley fast enough. try giving it rpms ans see if the voltage changes

Expert:  david craig replied 2 months ago.

I'll be back on in the morning. hope you get your computer issue worked out. let me know the results...thanks.

Expert:  david craig replied 2 months ago.

any updates?

Expert:  david craig replied 2 months ago.


Expert:  david craig replied 2 months ago.

do you still need assistance?

Expert:  sprinkles08 replied 2 months ago.

Hello and welcome to JustAnswer!

If the alternator isn't charging it may be the alternator itself, a poor connection, an internal failure in the powertrain control module or a wiring issue between the PCM and alternator.

Has any testing of the control circuit been done?