Wrong Alternator?

Mattax, thank you for the quick and extensive response. You gave me quite motivation and I did not wait until the battery is fully charged. So here the outcome of the steps you suggested, hope I followed them correctly and did everything right:

I. Battery (11.72V at the moment) connected and the ignition key on - reading around 11.60 at the Alternator field connector and around 11.55 at the VR input (the VR felt somehow warm) - differences in readings may also be user error or to be blamed on my cheap multimeter.

II. Removed brushes (they look good), and checked their connection, Alternator field does not have ground to the Alternator case

III. Cleaned the contacts on the Alternator and assembled it.

IV. Run a well-insulated wire from Alternator field to Alternator batt and mounted the Alternator back on the car - the green Alternator field wire is still connected

V. Started the car and went up to approx. 2000 RPM, Battery reading is 11.72V, Alternator output reads around 11.66 or so.

VI. Checked the Alternator gauge in the car - needle even with higher RPM slightly on the discharge side


I did the wiring on the Alternator very quickly and for sure it will not win a prize, but the connections are good.

I will order one of the two alternators, or if you guys can suggest a better one - I don't mind paying for an alternator, but I want something reliable and of good quality. My whole project was aiming towards cruiser with reliability.


Thanks, Wolfgang

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