Alternator Not Charging

Tiny
JETAIRAC
  • 1997 NISSAN TRUCK

Electrical problem 4 cyl Two Wheel Drive Manual 135000 miles

I have a 1997 Nissan Pickup that will not charge the battery. I have replaced the battery and the alternator and both test good. Can anyone help?

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Thursday, August 27th, 2009 AT 8:32 PM

8 Replies

Tiny
MHPAUTOS
  • EXPERT
  • 31,888 POSTS

There are two fuses and a fusible link that need to be checked to make sure they are not blown.

Here are a couple of guides and a alternator wiring diagram so you can do some quick tests.

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

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please let us know what you find.

Cheers

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Thursday, August 27th, 2009 AT 8:38 PM
Tiny
RASMATAZ
  • MEMBER

Check fuse no. 9 and 11 if okay-look at the charge system EWD

If both tested good than you have a wiring problem or the charge indicator


http://www.2carpros.com/forum/automotive_pictures/12900_nissan_charge_1.jpg

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Thursday, August 27th, 2009 AT 8:38 PM
Tiny
JETAIRAC
  • MEMBER

The output at the alternator is the same as at the battery. It is about 12.8.

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Friday, August 28th, 2009 AT 11:52 AM
Tiny
RASMATAZ
  • MEMBER

If this reading is being recorded while engine is idling its not charging-get the alternator tested again. It sounds like it is defective.

Here is a good unit from Amazon for $159.00

https://www.amazon.com/gp/product/B01L01MSOS/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&tag=2carprcom-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B01L01MSOS&linkId=1b63e6c831926ecbdc753d48fd7317db

Cheap one don't work most of the time.

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Friday, August 28th, 2009 AT 1:39 PM
Tiny
JETAIRAC
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The Alternator was tested yesterday and it was putting out 15 volts on the testing machine. I installed a NEW one yesterday and that one tested at 15 volts on the machine but only 12 volts in the truck as well. I dont understand how this can be happening, but it is.

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Friday, August 28th, 2009 AT 3:11 PM
Tiny
RASMATAZ
  • MEMBER

Disconnect the alternator and check for power at the yellow and red wire do you have it if not check the charge indicator and check bulb relay-

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Friday, August 28th, 2009 AT 3:42 PM
Tiny
JETAIRAC
  • MEMBER

The Charge Indicator light comes on with the key as it is supposed to, and then is extinguished once the car is started. The Bulb relay is another story, how do I test this relay?

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Friday, August 28th, 2009 AT 4:06 PM
Tiny
RASMATAZ
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Do you have a multi meter if so the coil side should read 40-80ohms, switch side infinite no meter swap it with a like one.

Here is a guide that will help

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let us know what you find.

Cheers

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Friday, August 28th, 2009 AT 5:23 PM

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