I find that strange that just idling or running will drain your battery so fast. Is the battery 'good'?
I assume the car dies if you disconnect the battery after starting it?
You'll want to verify the wires going to the alternator are good. Esp the ground.
Usually there is a wire to the PCM that controls the magnetic field on the alternator ( this determines how much "V" the alternator will oputput). Check that too.
This is all under the assmption that:
Originally Posted by Dano Moparo
yes the voltage regulator is part of control module. You need to replace the module, no parts are serviced for it.
I'm no expect on that year's PCM but I'll trust the post.