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While driving it loses power and shuts off

Tiny
YAJAIRA RODRIGUEZ
  • MEMBER
  • 2005 JEEP GRAND CHEROKEE
  • 3.7L
  • V6
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
When driving it loses power, it can still be driven. The dash shuts off, after a couple seconds later it completely shuts off. Changed battery, alternator but nothing.
Saturday, July 9th, 2022 AT 11:17 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Is the alternator charging the battery? Once you get the engine running again let's test the alternator output using a voltmeter. This guide can show you how. I noticed that this car has an IPM which goes out all the time and can cause this issue. It is easy to replace because it self initializes

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Here is the alternator wiring so you can see how the system works. Check out the diagrams (below). Please let us know what happens.
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Sunday, July 10th, 2022 AT 4:13 PM

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