I just bought a 1997 12V Cummins off of a friend of mines dad. The truck has 350,000 km and is in very nice condition. He is giving it to me for 3000 CDN which is a darn good deal for this 3/4 ton. The transmission was rebuilt 50,000km ago for roughly 3600 CDN. I know very little about this unit for now.

The truck seems to have a electrical gremlin. Driving down the road the lights all of a sudden go dim/flicker and the torque converter unlocks. I am not sure of all the symptoms yet but will have the truck in the next month or so. Has anyone seen or heard of anything like this before ?

Also what should i be aware of with a 12V of this vintage. I have a 2004 cummins as well. Does the 1997 need the KDP mod ? Anything else. Thanks

 

sounds like a short some where . look real close at the wire harness,also I would check all the grounds , the head light switch is a known problem,and yes the 97 has the KDP issue tab it fast.1 more thing if the alt. is going out it can cause that. crank sensor too

 

Check grounds, and maybe add another ground from battery to body. You may have an old ground going open now and then.

Chris