Engine/Transmission (1994 - 1998) Charging System Mod!!!!!

[Cummins360]

Hi I want to take the computer out of the charging system, I bought an old chrysler regulator from the junk yard and I need info on how to wire it up??

It had a blue wire and a green wire on it and I assume one is for field and one is for batt power, and the case is I assume ground. But any help would be appreciated.

-Travis

 

[RacinDuallie]

Why would you ever want to change to an older style alternator? They had way less amperage than these newer units.

 

[K5IP]

You can probably make this work, but it is a bit more complicated than you might expect.

Your present system does use the computer to provide the regulator funtions, but it also add some stuff. Since our diesels do not have a conventional ignition system (ignition on with key) The computer needs to know when the engine is running in order to power up the alternator. It gets this input from the engine speed sensor (sometimes inaccurately called the crank sensor). If you bypass this stuff with an external regulator, you will need to do something, perhaps an eternal switch to turn on the charging system manually.

The present system does enable alternator by engaging a relay (automatic shutdown relay). If you are willing to keep some of your computer functions you can steal battery power (alive only when engine is running) for that purpose.

The present system provides field power to the alternator from the ASD. The other side of the field is returned to the computer which provides a current sink (the regulator function) to ground.

If you delete this function with your external regulator, you will need to provide a ground for the field winding.



Why are you doing this? If your present system does not work because of a computer failure, I understand. If you simply have a speed sensor or ASD relay failure, (about the only other options) PM me and we can troubleshoot it.

Rog