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11-18-2004, 22:00

I have a 91 Plymouth Acclaim, and the alternator doesn't charge
the battery. I took the alternator out and had it tested, and
there's nothing wrong with it. I put a new battery in it, but
it still won't charge. I checked the fuseable link from the
alternator to the battery, and there is continuity. Therefore,
it must be the computer.

there are 4 connections on the alternator

L1: direct to battery, positive
L2: direct to battery, negative
c1: small wire, logic, to computer, activates diode
c2: small wire, logic, to computer, also battery ground.

I want to activate the alternator continuously and put on an
external voltage regulator.

What must the voltage (and current), to the logic inputs c1 & c2
be to do so?

I have in mind to run a potentiometer between L1 and c1, and
adjust it until the alternator kicks on.

The schematic shows that c1 goes to the coil of a transformer in
the alternator, which then goes to one of the diodes (an SCR?)

11-18-2004, 22:00	#1 (permalink)
Jon G. Civilians	alternator circuit question I have a 91 Plymouth Acclaim, and the alternator doesn't charge the battery. I took the alternator out and had it tested, and there's nothing wrong with it. I put a new battery in it, but it still won't charge. I checked the fuseable link from the alternator to the battery, and there is continuity. Therefore, it must be the computer. there are 4 connections on the alternator L1: direct to battery, positive L2: direct to battery, negative c1: small wire, logic, to computer, activates diode c2: small wire, logic, to computer, also battery ground. I want to activate the alternator continuously and put on an external voltage regulator. What must the voltage (and current), to the logic inputs c1 & c2 be to do so? I have in mind to run a potentiometer between L1 and c1, and adjust it until the alternator kicks on. The schematic shows that c1 goes to the coil of a transformer in the alternator, which then goes to one of the diodes (an SCR?)