Thanks for quick reply. Truck is 1995 Dodge RAM 2500 5.9L automatic 4x4. I just replaced fuel pump second time last weekend since it was still under warranty and same problem as before. I am thinking no spark since I did find that condition once. Hence I am thinking that some sensor signal to PCM is shuting down the ignition system. But how to capture which one I don't know. I mean I am old electronics person and mechanic but have never had to deal with a PCM type issue. I know when truck is dead some signals seem to be grounded at PCM but since engine not rumming I don't know if signal should be high or low normally. I should check when it is running.
Can't read all your code check screen but I know how to do that. I believe I have codes 23, 72, 56. Not sure how old they are since I don't know how to clear them and I don't have a code checker for this truck.
Thanks much for all help, Tim.
Friday, August 13th, 2010 AT 7:40 PM