TrooperR

New Member
Classic1992 V8 auto - alternator has become a bit iffy - regulation of current seems random with surges of the electrical accessories ( fans, lights etc.).

I have obtained a replacement, allegedly of the correct type, but find that there is a less than obvious way of reconnecting the wiring.

The B+ terminal is obvious as is the W post ( which I gather is the tacho connexion). There is a further post without any obvious ID, contained in the same semi-circular plastic channel as the + feed, & also provision for a female spade connector adjacent to the B+.

So, places for 4 wires only 2 of which can be identified. Any ideas for which of the remaining 2 wires goes where? I am reluctant to find out by trial & error when installed as I shall need to replace the end connector of one or t'other or both which will be easier done before the alt is bolted on.

The wires are not colour coded in the way they should be according to my Haynes manual!

Thanks in advance!
 
The other post should be for warning light, and the spade will be for AM interference suppressor
 
You probably could have got away just changing the voltage regulator in the back. For a tenner odd could be worth a spare unit for you
 
This should help, 1987 manual so layout maybe a bit different but same idea
alt.jpg
 
Thanks for all the advice so far...will apply over this weekend.
PS the ign warning light has remained on with the ign off - is that further clue that the alternator is stuffed?
 
Thanks for all the advice so far...will apply over this weekend.
PS the ign warning light has remained on with the ign off - is that further clue that the alternator is stuffed?

Each winding on the alternator will have a diode to turn the alternating current into direct (one way) current. Sounds like one of those might have failed allowing current to flow back the wrong way.
 
Thanks for all the advice so far...will apply over this weekend.
PS the ign warning light has remained on with the ign off - is that further clue that the alternator is stuffed?
Most likely. But it will just be a diode failed so the alternator could be repaired..
 

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