I know there are some of you that dread the day hen the voltage regulator gives up the ghost because you know the PCM has to be replaced... Well I dug up the information and artwork for doing a old school regulator to replace the PCM function. http://mopar.mopar1973man.com/cummins/general/voltage-reg/voltage-reg.htm

I use a VW regulator fit prety well on this alternatorthe regulator just need a switched power B+ but not direct in series with a dash bulb. One wire only.When no charge due to alternator fail the light keep on all the times..