Alternator Identification

Jun 09, 2004 2 Replies
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Hi , I have a 1970 VW Ghia , rebuilt the motor ( upgraded a ton D.P.Kads etc.}.Inserted motor and ready to wire but questioning the alternator type ( switched from Gen. to Alt.).I bought it thru ebay as a Motorola internally regulated unit . I will describe the terminals on the Alternator...on the top of Alternator is a white square plate with only 3 screws on the on 3 corners , 4th corner is blank (size of square is about



1 3/4" x1 3/4" ).In the center of the white square (but still part of that assembly ) is a white circular section (rise about 1/2 - 3/4") and about an inch in diameter , with three male spade (flat) type electrical connectors ...each connector has a designation (1) says D- , (2) says D+ , (3) says DF . Then the only other connector on the Alt. is to the right of the white sguare , it is a fairly small stud with designation..B+ ............am I internally or externally regulated ?......am I Motorola or Bosch ?...do you know any part #'s or suggestions if I have to buy an external Volt. regulator to make sure I get the right one? I think I can get the wiring handled if I can figure out exactly which Alt. I have . Speedy Jim has a most excellent web site on wiring and tons of vw tech help ...Hey , I know this post is huge...very sorry ...my car is ready to fire up and I'm stuck .Thank-You for your time , VonFultz (Robert)
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C

My guess (Speedy Jim correct me if I'm wrong) is that you have an externally regulated Motorola alternator part #043 903 023. The part number should be visible on the back (back is back) of the alternator.

If you can confirm that part #, then you'll need to find yourself an external Motorola regulator (part # 043 903 803A). These are the ones that are mounted under the back seat (driver's side) and are about the size and shape of a small pack of cigarettes. The regulators are becoming very difficult to find as I believe this alternator / regulator pair was used only a few years ('73-'74 ?) in North America.

I believe Speedy Jim's page has the wiring information you'll need.

Good Luck.

MZ

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Thank-You MZ your info is helpful , I will write down the part #'s you gave and put it in a file I know have for this alternator set up . I Figured out what exactly the alternator is (Speedy helped me exactly identify it etc....he was a HUGE help I was stuck). It's operating now and I have about 5 different voltage regulators on file which a Bosch direct replacements . I got mine GP Sorenson from Advanced Auto cause they had it the next AM $30.00...just bought a Napa Echlin on ebay for $9.99 , $5.00 ship ..spare anyways Thank-You so much for your input , VonFultz

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