i would check the ground probably not the problem but its were i start when i work on dodge knowing how bad they are. never seen copper wire rust till i worked on dodges they would be rather good if they bought better wire i love how easy they are to work on

 

Using the diagrams that Ramzy sent I was able to track the pins affected by the bare wire that I suspect is the culprit. Surprising enough the pins were 10, 14, and 25 and all three are for the Leak Detection Pump. So I am off the check. lol

 

Which sensors have voltage on both sides?

 

Sensors that have voltage on both sides would be: Crank Position sensor, Throttle Position Sensor, Camshaft Position Sensor, Map Sensor. But, when I check the EVAP Leak Detection Pump I get nothing. So I check the wires for continuity from the plug in to the Leak Detection Pump and the appropriate pins on the PCM harness and they all check out, no issues. So that tells me that there is an issue within the pcm.

 

Bob1500 I check the ground first as that was the first and easiest thing to check. Got to check the easy stuff first. lol

 

Unless anyone else has anything to add or to check I am pretty sure I will be ordering a pcm. Don't think it could be anything else. Thanks all for all the insite and help.

 

I tend to agree with you. Most of those wires are in the same connector, but, NOT right next to each other..... as a final test, unplug that connector from the PCM, and with the various sensors unplugged, check for continuity between the wires, and also the wires to ground. If they check out ok, I do believe you are correct. Time for a PCM. Is there a wrecking yard around that you could get one cheap from, just as a test??

 

I will do that prior to ordering, whats one more day and more testing. I want to be sure before I dump a couple hundred dollars. I did call the local salvage yard and used auto parts store and they checked the entire midwest and absolutely nothing out there. I may have to try calling a few others but i think I can send this one out to get repaired. Otherwise I'm looking at anywhere from $200-$800 for a re-manufactured pcm. Unless I can find a schematic and go through it myself.

 

So someone correct me if I am wrong, I do believe I should get some voltage to the Leak Detection Pump from the PCM on at least one of the three pins correct?

 

Looks like there should be 12 volts on pin 2 of the connector. (dark blue wire)