charging problem

You have to check the ballast resistance with all wires (or at least both wires on either end) disconnected.

If you disconnected the wiring and showing zero ohms, then your meter is not accurate

Here:

http://www.mymopar.com/index.php?pid=115

Notice that one side (this varies a bit) is the same resistance as the "single" ballast below. The 5 ohm side was only used on older Mopar ECU boxes to supply the box. This was "designed out" somewhere along the line. None of the aftermarket boxes know of use a "dual" ballast

Not knowing "how" you took the reading at the high side of the ballast, it may be meaningless

We are having a disconnect, here. There is a REASON that I detailed EXACTLY how to take these readings. This is so that I KNOW how you took them, as if "I were standing there" so that I know what you did and what it means

Please review my very first post:

67Dart273 said

To check voltage drop turn the key to run but with engine not running

Put one probe directly onto battery positive post. Put the other probe as "close as you can" tot he regulator IGN terminal. This might be the "high" (ignition switch) side of the ballast, or the blue field wire on the alternator.

You are hoping for a very low voltage, the lower the better. More than about .2-.3V (three tenths of one volt is too much

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