NOSLEEP

Well. The truck is fixed. This I can say for certain. The crankshaft position sensor sends a signal to the PCM to let the PCM know the engine is running. The PCM does not operate without the 5 amp signal from the crankshaft position sensor. The list of inoperative features include all of these: No tach, No speedometer, No charging system, No overdrive lock out, No auto trans shifting, No manual shift into 1st gear, No wait to start light, No water in fuel light, No cruise control, No air conditioning. Installed a new cps and everything worked immediately. Anyone need a PCM I have a spare. The dealer is making a large adjustment to the bill. I replaced the cps on my own out of frustration. All is well again. Thank you all for your suggestions and help with this problem. Hopefully someone else can benefit from this information in the future. CHEERS...

Yes the engine starts and the truck can be driven. Nothing pcm related operates.

Thanks for the kind hello & the advice... Cheers.

Tested all the fuses, fusible links and grounds. Checked all wires from pcm for continuity through harness to dash behind cluster as well. I have removed the alternator for testing tomorrow morning. Dodge dealer says faulty alt can burn out a pcm. They believe the replacement pcm was burnt out when it was installed by a possible failing or faulty Alt. I am having a hard time with this problem but I am persevering... - - - Updated - - - This might be a little late to bring this up... could a crankshaft position sensor cause all these problems at the same time. If the crankshaft sensor was faulty could it trick the pcm into thinking the truck was not running. No a/c, cruise, tach, speedo, trans overdrive or shift, wait to start light, temp gauge... just thinking out loud.

Awesome. Thank you gentleman. What is an FL?.... Fusible Link?

I am taking the day off work tomorrow and going to spend some time trying to find the problem. I sincerely appreciate all suggestions. Thank you.

Hello fellow Dodge truck enthusiasts. I have a 1997 Ram 2500 4x4 Ext/Cab diesel automatic. I have in the last few weeks encountered a problem I haven't been able to fix. Its been in the shop costing me thousands and I don't know if I should scrap the truck. Its in such great shape. I just had it repainted 3 weeks ago. After parking the truck from a normal days paved highway use. Start truck: No tach, speedo, manifold heater, water in fuel light, charging, cruise control, overdrive or transmission shift, air conditioning. Shop has replaced PCM, wiring plugs connected to PCM, and spent dozens of hours trying to find the problem. I am running out of hope and money...

Old guy and old truck. I have a 1997 Ram 2500 4x4 diesel auto. I have owned it since 2001. just under 400 km. In need of help. Hello everyone...