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Registered
Join Date: Sep 2004
Location: Fort Collins, CO
Posts: 631
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Need help installing alternator
Hello,
After deciding that the squeaking from my 79SC engine was a bad alternator bearing, I decided to replace it with a rebuilt version which is all I can afford right now. Interestingly, I found that the alternator in the car was a rebuilt Marchal, not original equipment. Not sure how many miles it had on it. Anyway, the "new" Rhone rebuilt alternator has less terminals than the old one:  My wiring before was as follows: Terminal Wire B+ .... Red wire with boot +61 .... Blue wire with boot D- .... Fat black wire second D- .... 3 red wires DF .... Thin black w/ quick connect I'm not sure how to get these 5 wires on the new Rhone with only 3 terminals that have no markings on them at all. The Rhone does have "Porsche" written on it with 911 603 120 04 J so I'm hoping it is compatible. Can anybody help? Thanks! |
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04-12-2005, 07:38 AM
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My assumption is, your "new" alternator has an internal regulator as opposed to the external regulator used with your old alternator. Sorry, I can't tell you which wires get connected (or where), but you'll be eliminating your external voltage regulator and a couple of wires that attach to it. A search will probably give you the above information. You may also have to wire a resistor in parallel with the alternator light on the dash (one of the reasons I had my original rebuilt rather than "upgrade" to the newer style).
Jerry M '78 SC |
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04-12-2005, 07:51 AM
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Here you go..from host.
  I'll buy your old marchal..PM me with a price
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Donnie Currently Porsche-less..... 
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04-12-2005, 07:59 AM
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Join Date: Sep 2003
Location: Vermont
Posts: 1,199
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04-12-2005, 08:01 AM
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Registered
Join Date: Sep 2003
Location: Vermont
Posts: 1,199
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Don beat me to it....
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04-12-2005, 08:01 AM
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Registered
Join Date: Sep 2004
Location: Fort Collins, CO
Posts: 631
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Thanks everyone.
I don't know what I would do without this board. Martin
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Sheena is a punk rocker Suzy Is A Headbanger Heidi Is A Headcase Judy Is A Punk The Ramones' earliest titles included 'I Don't Wanna Walk Around with You,' 'I Don't Wanna Go Down to the Basement,' and 'I Don't Wanna Get Involved with You.' Dee Dee later said, "We didn't write a positive song until 'Now I Wanna Sniff Some Glue'." |
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04-12-2005, 08:16 AM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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Just be careful still....
The tech articles are correct ...as to which wire gets connected to which post.... I seem to recall, however, that some applications position the alternator in the fan shroud so that the 12 o'clock position ( as seen on the backside of the alternator per the Tech Bulletin) might be at 6 o'clock ...as installed. If so, don't fret....follow the wiring pin-outs of the tech article but note that the "clock" may be rotated 180 degrees...adjust your thinking accordingly. If not...and it goes in as shown...well....good for you !!! - Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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04-12-2005, 08:55 AM
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1978 Porsche 911 SC 3.0
'74 Porsche 911 2.7
