Voltage regulator

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Voltage regulator

Postby maredlin1 » Thu Mar 15, 2018 11:10 pm

I will try this again
I have a 1986 Chrysler 2.2 turbo town and country (the old station wagon type).
Put in a new (tested) Remy 14495 altenator and get no charge. I get a #12 code. Nobody knows where the regulator in this car is. Went to the Dodge dealer to ask if they knew, after looking in computer for 1/2 hour they called the old timer , who knew all about these cars. He thought it was in the logic module or the control module, but like everyone else he had no idea which one. For one reason there are about a dozen names for each one of them. And yes I have checked all the grounds. The one thing I like about this car is all you need to work on it is a 15mm,a pair of pliers,vice grips and a screw driver (nothing else fits)
Thanks for any guess where regulator is
Doug
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Car Information: Chrysler town and country 1986 2.2 turbo

Re: Voltage regulator

Postby 89ARIES » Fri Mar 16, 2018 5:41 am

Hi Doug, welcome to the club. Would love to see some pictures of your wagon. You could email them to chryslerkcarclub@gmail.com.

I have the exact same car by the way. I have an electrical stalling problem currently being worked on.

I am almost 100% sure the voltage regulator is actually part of the logic or power module. I can confirm with our club technician and let you know.

God bless.
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Re: Voltage regulator

Postby K-CAR_WAGON » Sun Mar 18, 2018 6:12 pm

I think on your car the regulator is actually split between the logic module (inside car) and the power module (under hood). The voltage is sensed by the logic module, which generates a control signal, which is sent to the power module, which generates alternator field coil driver output signals to the alternator.

The minimopar web site has details, description and pin-outs.

http://minimopar.net/ecu/index.html
http://minimopar.net/ecu/lm-1986-t1.html
http://minimopar.net/ecu/pm-1985-turbo.html
http://minimopar.net/charging.html

By the way, code 12 indicates loss of power. (Multiple possible causes.)
http://minimopar.net/fault/code12.html

You could also have a bad connection (broken connection or high resistance) somewhere along the power, signaling or ground paths.
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Re: Voltage regulator

Postby Artie K Car » Sat Apr 07, 2018 6:03 am

Hi maredlin1 - I did some research and found some interesting facts..........
It appears that your vehicle had a "choice" (??) of 2 different alternators - one with an external regulator, and one with an internal ( inside the alternator ).

I suggest you go to the autozone page, log in, and look at the Repair Guide for your vehicle.

You will see good diagrams that show the regulator + the alternator w/the internal regulator, but the internal one does not show in the diagram of the alternator..........the external one should be easy to see in the engine compartment.

Hope this helps !!
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Car Information: Plymouth Reliant America Sedan 1988


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