Yeah spoke with another local mechanic who dealt with this problem. He said it was the PCM as well. This PCM is not the factory, it is a reman looks to be built around '05. So I am guessing that this truck has been down this road before. According to KBailey and other postings I have read, if it involved the CPS then it should not start at all with the bad ESS (CPS) due to it being shorted out, is that correct?

 

know anyone with a good pcm who will let you swap to see if that fixes your problems?

 

great minds do think alike...so i pulled the PCM and called a local salvage yard that I know has some trucks with working 12v in truck to see if he would let me plug this one into the connectors to see if my pcm is bad....of course he didn't get the point that it wouldn't hurt his.....he was afraid I would fry his cluster..tried to explain to him that there is only signal voltage running through this circuitry. Although had a friend who is extremely well versed in electronics put a second set of eyes on it and it seems that the 5V internal regulator could be fried, because I can't prove the necessary 5V to the sensor circuitry. I'll keep everyone posted on this one.....looks like I'm on the road to a bad PCM...but got to know for sure.

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sucks that it had to be this way, but I am learning a lot bout the ole Dodge...first diesel I've owned....its a vital truck to my landscaping biz so needless to say the learning curve has had to be short and fast

 

I'm reading this thread because I'm having a similar problem. I did a KDP fix and after have no tach or speedo. Other gauges work, but lock-up TCC doesn't. Voltage is at 15+ volts by the gauge, which tells me no regulator.

I'm not getting any codes or CEL. Truck starts and runs fine (in fact, better than ever with the 3000 GSK, bumped timing, and #10 plate). Starts almost instantly.

I did replace the crank sensor last night with a new Cummins part. No change. I've checked all the small fuses, but not the big guys. Perhaps one of them has bit the dust.

Just looking for some insight into the problem so I can get back to driving the truck. I have driven it to work a couple days without everything working, so I know it runs well, starts and shuts down the engine.

One thing I did was to pull the fuel heater harness from mine. The fusible link was burned down and it had a bare wire shorting on the fuel pre-filter. Could that be any potential cause? Don't know when that happened, but it appears to be some time ago from the corrosion on the wires (just got the truck and am checking everything out). I also had the dash panel out to fix the heater controls and to paint the needles on the gauges. Other info is in my sig.

Thanks...

 

I still have a link to my original thread... Which is basicly how I found this site, and just commented on a previously made thread. But long story short, it was the PCM.

https://www.dieselbombers.com/12-val...-problems.html

 

Anyone have a part number or the proper term so I can look one up on the solenoids that control the grid heaters? They are the ones right below the fuse box on the driver's side fender well, under the hood. One of mine has a main stud that is loose. No fixing that, and that may be my issue.

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Found an answer... A Ford or Jeep non-grounded starter solenoid (actually a pair) will do the job. Cost is about $10 at most auto parts stores.

Autozone part number - AM433 and others.

Reason for non-grounded solenoid is that the Dodge uses grounds to energize systems and a grounded solenoid will be hot all the time.

 

Thank u all for the help is wae my ecm got a new ECM everything works now. All i need now is video or driagram on how 2 rebuilt a 47re transmission Thanks In advance. Can some 1 help please

 

PCM's are vin specific, meaning its programed for that truck and its vin number. Swamping them out with another truck will wipe the memory out and you will have 2 bad PCM's instead of one.

 

i have an 02 cummins 2nd gen 24valve with a 12 valve pump, and i know my coumputer is fried i am for sure of that, i am trying to figure out how to wire up and external regulator so it can charge can anyone help me out

 

I have a ATSG manual you can have. I can email it to you if you still need it.