So if you turn the key to 'ON', and wait 1/2 minute, does the engine fan warp up to, well, 'warp speed'?
If so, the ECM is not powering up and this is most often caused by a failed output of the engine control relay on the RCM. The usual suspect is the relay itself or a solder path on the RCM board.

Resoldering the RCM may not work if you don't know for sure what path/rivet was at fault, or if the issue is really the relay itself.
Turning the key to "ON", and using a voltmeter to trace the output of the relay will tell you what is going on. An alternative is to ship the RCM to DJ or order a new one.


Also, starting a new thread is not productive, as now I (we?) don't know what has gone on up to this point.