I push the button, it doesn't start.

[thorn14]

So I'm an idiot. On the checklist I forgot the part about having the bike on and testing with the starter button pressed.

So in that case at the solenoid connector, I read 12.9V on the red/green wire. On the red/black wire I read 9V. Across both wires  at the connector I read 9V. Combined with the 1.5ohms resistance on the red/black wire and the corrosion I found when I stripped the wire, I'm assuming it is bad.

Question, the diode for the solenoid is wired in parallel, could it go bad? If so is there a way to test the diode without cutting it out of the loom? If not I assume I would just replace the red/black wire all the way to the ecu. Then theoretically it should start?

Edit: found this thread (http://www.ducatimonsterforum.org/index.php?topic=56569.15) describing a way to bypass the ecu as a last resort.

[Rudemouthsky]

It's threads like this that make me glad I'm running FCR's. Good luck T13

[Bill in OKC]

Without a wiring diagram - I'm kind of guessing here from what I know about diodes and solenoids.  If the diode was bad, usually an open the starter might be slow to disengage.  If it was shorted -unusual/unlikely- then the solenoid would not engage.  My guess is -like you wondered earlier- if the power wires were reversed the diode would short out the power across the solenoid and it would not engage at all.  ...If I have read this thread right...  try reversing the power wires to the solenoid.

[thorn14]

I got it running yesterday by bypassing the ECU similar to the thread I linked earlier. Only difference is I didn't install my battery backwards, it merely stopped starting after a few times.

I'm still betting it's all the gratuitous amounts of corrosion at every wire and connection I find, all stemming from the steering head routing which split the loom open and was not closed prior to my owning of the bike.

Checked the diode a few nights ago and it was fine. Yet the connections inside were all covered in yellow dust (assuming some sort of corrosion).

Thanks for the help guys.

[Speeddog]

I've seen a couple cases where water got inside the cluster, and it fries the sidestand switch wiring, and then the circuit in the ECU that runs the starter solenoid quits working.