Originally Posted by tigridr-1
The motor "not turning over" is it is not cranking. ...
OK - that is nothing to do with the ECM then.
For the starter to spin, you need positive power and
ground return simultaneously to the starter solenoid - these are both switched sources so could be either that is missing preventing the solenoid from operating.
Ground - this comes via the clutch interlock switch - probably been a while, you are remembering to pull clutch lever, yes?
Otherwise need to make sure the switch is actually closing.
Positive - that comes via the Kill switch and on to the Starter Switch: we know that the Kill circuit is good since you have ignition power (confirmed by idiot lights and the pump priming); This signal also interrupts the headlight power so is good indicator for whether your start switch is operating - press and hold the start button WITHOUT operating clutch lever - do headlights go out while you hold start button?
If yes, then positive circuit is good - look to the clutch switch interlock as source of problem
If no, then start switch is not closing properly - look to the start switch itself.
Also, just check on the solenoid itself - make sure that the low current control wires did not get knocked off in the process of messing with the ECM