Dodge Repair Questions? Ask a Mechanic for Answers ASAP
OK. That's the correct voltage at both ends of that bus, which will normally indicate a bad PCM. Does everything else work as it should, i.e., instrument panel/gauges, trans shifts OK, ABS work OK, etc.? Is the scan tool OK?
The trans control module is in fact part of the PCM. If that other Durango is identical in every aspect regarding powertrain and accessories, the reason why your vehicle doesn't run with that other PCM might be because it has not been configured to your Durango's VIN.
The whole thing can be related to the trans not shifting. First thing you need to do is turn the ignition off and climb under that truck and disconnect the harness plug to the solenoid pack in the trans. Clean it thoroughly and inspect both halves for bent pins, corrosion, or any other thing that could cause an open circuit. After the inspection, spray both halves liberally with WD-40. Next, plug your scanner back in and turn the ignition on. Please tell me if that takes care of the issue.
Got you. Please let me know what you find.