Voltage Regulator fix

[mdlowry]

I posted a little while ago about a problem with my alternator regulator. Here is the fix that was done:

The two wire plug on the alternator was modified. On my truck the wires were colored blue and green.
The alternator shop used an older Chrysler regulator* to replace the computer controlled one.

The two wire connector was unplugged and the green wire was cut about 2. 5" back from the plug (in case I ever wanted to go back to the original configuration. ) The blue wire had some insulation stripped to tap in for the signal.

The "center" pin on the regulator was connected to the plug side of the green wire cut in the previous step.

The "side" pin on the regulator was spliced in to the blue wire.

The regulator was mounted on the passenger side fender well between the batter and the air filter.


REGULATOR center------------------------------------- Blue Wire harness comming in
|
side ----------- | cut --------- Green
| |
| |
| |
Green Blue

Plug to
Alt

I'll take a look at my service manual tomorrow to find out what signals were on those two wires in case the colors have changed. My truck is a 2000 with the 136Amp alternator.




* I'm not sure about the part number on the regulator, but I coppied this off it:
Transpo
C8312
12V 281

 

[mdlowry]

Well, looks like the diagram didn't work too well. Here's a screen capture of what it should have looked like.

 

[MidwestMotorman]

thanks

Thanks for the info. Never know when an inexpensve fix like this could save a few hundered dollar repair bill.

 

[C Schomer]

The old 2 wire Mopar regs are simple. One wire is ign. and the other goes to the rotor. I used to use them to convert generators to alternators. Craig

 

[mdlowry]

Originally posted by C Schomer

The old 2 wire Mopar regs are simple. One wire is ign. and the other goes to the rotor. I used to use them to convert generators to alternators. Craig

Thanks Craig.



The ignition wire was the one that was spliced in. The rotor wire was the one that was cut.



I remember when they were testing, the one that was spliced was the one that was momentarly hot when I started the truck.



mdlowry

 

[mdlowry]

Re: thanks

Originally posted by nathanbush

Thanks for the info. Never know when an inexpensve fix like this could save a few hundered dollar repair bill.

It already has.