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Old 24-03-2014, 20:43   #1
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Join Date: Dec 2007
Location: Mississippi
Boat: beneteau , first , 1983 ,38
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Wires Motorola Alternator

Wanting to hook an external Balmar voltage regulator to a
Motorola 9RC 7052 alternator that is on my Perkins 4 108 on my 84, Beneteau .

Where can I get a manual of this old 1984 Motorola alternator?

Anyone have any idea of the 4 wires that are on the Alternator Pictures that are enclosed.
# 1= red - positive , #2 - Black, # 3: blue ??? #4- Orange ??
which are the field and the static wires ?

How do I bipass the voltage regulator that is built to the alternator and hook up the ARS Balmar Voltage Reg.

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Old 24-03-2014, 21:47   #2
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Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 6,607
Re: Wires Motorola Alternator

Like this:

Alternator Regulator Wiring Diagrams Alternator Regulator Wiring Diagrams (all three)

Yours is a little different inasmuch as I replaced the alternator at the same time, so the Ford plug is different, but the concept's the same.

Wire-by-wire, inch-by-inch, row-by-row.

Good luck.

PS If your external regulator is "requesting" high output, you might want to use the Small Engine Mode or the Amp Manager or both. You can find many dfiscussions right here, as well as here:

Electrical Systems 101 Electrical Systems 101
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
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Old 24-03-2014, 21:58   #3
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Join Date: Jan 2012
Location: Thailand
Boat: Herreshoff Caribbean 50
Posts: 502
Re: Wires Motorola Alternator

If its the same reg as i have on my Motorola.. Very hard to get at the brushes as they are epoxied into the regulator package..
Steve .. It was the last one that did this !
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alternator, motor

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