Computer problem
1997 Dodge Truck Four Wheel Drive Automatic 275000 miles

Yesturday I started my ram2500 V10 and had a great loss of power from a dead stop. also GEN light came on tested Alt. at Autozone not charging. got new Alt and installed it no change Gen light on. took it out and returned to Autozone had first Alt and new Alt bench tested. Old Alt failed and the new one passed. got help yesturday here on the forum. I was told ECM is Bad. Today reinstalled the Alt and drove to Autozone and had them check the codes. they are as follows

0757 witch is
Definition: 2-3 shift solenoid valve performance.
Explanation: ECM has detected an open orshorted condition on the shift solenoid circuit.
Probable Causes:
1. shift solanoid failure-repair other codes first
2. open or short circuit condition.
3. Internal transmission failures.

1765 witch is
Definition: Transmission 12 v supply relay controlo fault.
Explanation: ECM detected the voltage on the trans relay circuit was different then expected.
Probable Causes:
1. Relay defected
2. open or shorted circuit condition
3. Ecm Defective.

My Question to you is. Does everyone think #3 of code 1765 ECM Defective is correct?

Hi:

Based on what you are telling me, it does sound like the ECM is bad. The alt is regulated through the computer (ECM), so it could be causing many different problems for you.

Joe