5000CS overcharge

Bernie Benz b.m.benz at prodigy.net
Wed Jul 24 13:00:09 EDT 2002

Sounds like your new regulator is shorted, applying full bat voltage to the
field windings.  The other problems are irrelevent to this alternator


> From: Steve Crosbie <scrosbie at integraonline.com>
> Date: Wed, 24 Jul 2002 11:08:01 -0500
> To: 200q20v at audifans.com
> Subject: 5000CS overcharge
> My 87 5000CS is overcharging.  I am measuring 17.3 volts off the battery
> measured by a  voltmeter and the climate control diagnostic channel 11
> while the car is running.  Originally the car was not charging enough,
> we installed a new regulator which did not fix the problem.  Next we
> swapped alternators with a good one in another 5000CS and put the new
> regulator in it.  It worked for a week and now we have this overcharge
> condition.  The battery volt light comes on erratically.
> Other possibly related problems:
> 1.    When the headlights are turned on, the dash lights and climate
> control lights turn off, unless the headlight switch is moved extremely
> slow. (replaced turn signal/headlight switch with a working one and
> problem persists)
> 2.      The fans kept going when the off button on the climate control
> button was being pushed.  This only happened twice immediately after
> starting the car.
> 3.    Sometimes times when I accelerate the climate control lights get
> brighter.  These last three problems have started within the last month.
> Note: the rear cigarette lighter was found to be pushed in a few days
> ago, but is now out and all problems are the same.
> Thanks in advance for any help
> Steve
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