Gunny

Thank you all for your Input. I will follow your instructions completely. Next up - WT mod. Then PCM Protection Fuse. New alternator is on the way... Gunny

So, PCM from Car Computer Exchange - Used them for a '90 Dakota and had good results. The PCM did not solve the charging issue. I have not yet done the WT mod. My worries is the erratic shifting and the truck trying to start out from a stop in 2nd or 3rd. I have been manually shifting and keeping it below 35 with light throttle load ( I am down to this as my only vehicle). Truck was in the shop today (ICDI Diesel) to get a professional and fresh set of eyes on it. They stated that the ECM & PCM were not communicating and there may be a fault in the wiring between the two. They did not have the time to track it down and asked me to bring it back on Monday to complete the job. I will look into the WT mod and may take that monster on over the weekend.

2002 24V w/Auto Trans. All Stock. The past 2 weeks have been riddled with an intermittent Check Engine Light, Erratic shifting and a Voltage gauge going from just over 14V down to nothing, triggering a Check Gauges warning light, then within seconds the gauge climbs to 12-13V and the Check Gauges light goes out. The intermittently flashing CEL usually coincides with erratic shifting and hunting of the lockup converter or what feels like clutch/band slippage in auto tranny. Started with checking the batteries (Good), checked the Field wires from PCM to Alernator and the PCM was not sending signal (Dark Blue wire). Continuity test of the dark blue and the green wires from the PCM to the plug at alternator were good. The 140A fuse is good and there is 12V power to the back of the alternator. There is no Crank Position Sensor on this Cummins. (I found out after removing the Starter...stupid!). So, to rectify the P0320 code, I replaced the Camshaft Position Sensor. (That was not fun...) This led me to believe that the PCM was faulty. Ordered a replacement and swapped it out per instructions yesterday... Cleared codes and P0320, P1682, and a new code P1899 showed up. This is my daily driver and only vehicle. I am stumped. Please Advise Gunny.