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Will not start without battery jump

Tiny
LYNDA LANE RUWWE
  • MEMBER
  • 2002 JEEP LIBERTY
  • 3.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 158,000 MILES
It has been running good. Vehicle wouldn't start today. I had to jump battery. I have put in new alternator (it is good), new battery (checked it is good), new radiator, new fuel pump, new power steering pump. I know I need a new serpentine belt. Could that disrupt alternator from charging battery? I need ideas. Thanks.
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Thursday, January 17th, 2019 AT 12:30 PM

3 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Yes, that is a possibility. If you say that the battery and alternator have tested good it is possible that the serpentine belt and or the tension-er are not holding the belt in place with proper force/tension.That will cause the problem.This will keep the engine while running from having the alternator keep the battery charging. Here are a few tutorials to view showing what is involved:

https://www.2carpros.com/articles/how-a-serpentine-belt-works

https://www.2carpros.com/articles/how-a-serpentine-belt-tensioner-works

https://www.2carpros.com/articles/replace-serpentine-belt

https://www.2carpros.com/articles/serpentine-belt-tensioner-replacement

I've attached a picture of the belt routing diagram below.Hope this helps and thanks for using 2CarPros.
Danny-
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Friday, January 18th, 2019 AT 2:45 AM
Tiny
LYNDA LANE RUWWE
  • MEMBER
  • 4 POSTS
I changed the serpentine belt and still had the problem. I started checking the wire connections and located the problem with alternator wire in clamp was loose and secured it in. Starts everytime now and battery stays charged. Thank you
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Monday, February 4th, 2019 AT 10:39 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You are welcome!

Thanks for using 2CarPros. Hope you will use us again if a problem arises.
Danny-
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Tuesday, February 5th, 2019 AT 6:19 PM

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