Put new alternator on and it still wont charge

Tiny
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  • 2003 PONTIAC MONTANA
  • 111,111 MILES

Put new alternator on and it still wont charge. Drains new battery.

Wednesday, December 5th, 2012 AT 9:45 PM

5 Replies

Tiny
SATURNTECH9
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You need a multi meter so we can trouble shoot the problem. Here is a guide to help with the problem.

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

You need to check the wiring

https://www.2carpros.com/articles/how-to-check-wiring

Here is the alternator wiring harness (below) make sure you check the alternator fuse.

There is a red wire going to terminal B+ the one with a nut on there should be battery voltage there at the alternator. Also the orange wire to the D terminal at the alternator should have battery voltage. Let me know what you find?

Check out the diagrams (Below)

Please run this test and get back to us.

Cheers

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Thursday, December 6th, 2012 AT 1:42 AM
Tiny
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Now have multimeter

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Saturday, December 8th, 2012 AT 2:28 PM
Tiny
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Lets start with the engine idling what is the voltage reading at the battery?

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Sunday, December 9th, 2012 AT 1:44 AM
Tiny
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11.90 so I checked the wiring like you said and found the wire had pulled out the the connector once I fixed it the alternator is changing ya! I love this site.

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Sunday, December 9th, 2012 AT 1:40 PM
Tiny
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Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken

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Sunday, December 9th, 2012 AT 5:47 PM

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