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Urgent help!! alternator wont charge

 
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Paulyy  



Joined: 05 May 2014
Posts: 87
Location: Melbourne

PostPosted: Sat Jul 29, 2017 1:40 am    Post subject: Urgent help!! alternator wont charge Reply with quote

Ive been tackling some back yard job wiring on this car. The starter wring was arcing out causing all sorts of issues.

We've re done it. But now the alternator wont charge. The battery light wont turn on. But there's 12v coming from the 3pin plug that goes to the alternator. i've tested the wires, and ran new ones. Ive changed alternators to a known good one and no charge.

It's wired correctly as i went by the schematics.

Any help appreciated

I need to get this car driving tomorrow as its booked in for a road worthy and running out of time.
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Kenodog  



Joined: 25 Jun 2003
Posts: 2460
Location: Vancouver,B.C.

PostPosted: Sat Jul 29, 2017 1:44 am    Post subject: Reply with quote

Silly question but is it grounded correctly ? If it is and still not charging then try to run a direct cable from the alt to the battery and by-pass the starter.



Leigh
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1981 931, Sabine
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Paulyy  



Joined: 05 May 2014
Posts: 87
Location: Melbourne

PostPosted: Sat Jul 29, 2017 1:53 am    Post subject: Reply with quote

Kenodog wrote:
Silly question but is it grounded correctly ? If it is and still not charging then try to run a direct cable from the alt to the battery and by-pass the starter.



Leigh


Yes its grounded, the car starts ect no problem there.
The battery connects to the starter and the starter goes to the alternator and there's power at the big and little cable on the alternator.
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924 - Race car project in the works.
http://www.924board.org/viewtopic.php?p=384410#384410
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Paulyy  



Joined: 05 May 2014
Posts: 87
Location: Melbourne

PostPosted: Sat Jul 29, 2017 2:03 am    Post subject: Reply with quote

i pulled the cluster out and battery light works too
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Paulyy  



Joined: 05 May 2014
Posts: 87
Location: Melbourne

PostPosted: Sat Jul 29, 2017 4:49 am    Post subject: Reply with quote

Ok finally fixed it.

after 4 hours of trying and testing. I had everything wired up correctly, and i'd turn the ignition on and id hear relays clicking, and the dash would dim.

i thought i must be on the right track weirdly.

So i unplugged 2 of the 3 wires from the 3 pin plug that goes to the starter. (i cut the plug off and use spades as the wires where about to fall off the crimps)

Started the car. plugged them back in and it worked.

I don't even know what the initial problem was. Im suspecting grounding.
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951 - 400whp.
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