SeaDoosFriend
New Member
I'm posting for a friend who has (2) identical Sea Doos. One of them will not turn over/crank/start, and the other one starts/runs just fine. A few days ago I helped him in trying to debug the situation. We swapped, one at a time, every conceivable part, including the main wiring harness, and the one that would run, continued to start just fine. We swapped out the MPEM, rectifier, Starter solenoid/ignition module, which includes the coil, Safety switch.
When one tries to start the "bad" one, nothing happens, no cranking, nothing. The starter will crank when jumpered on the solenoid. He seems to think that the safety switch has some sort of chip in it, although I see no evidence of that in the full manual that he has.
We ohmed out the black/yellow from the computer to the starter plug, disassembled the main plug on the computer connector and ohmed out all the wires we could, went through the safety switch and starter button, ohming procedure (he already bought a new starter button also, which we double checked) .. and all works as trouble shooting instructions indicate.
I have a background in HVAC, and pretty much understand wiring diagrams, etc., and am an engineer, and he's a fairly sharp guy too... but dang.... this just doesn't make sense to either of us.
I already read about "bad ground" previously posted, and he pulled all black wires he could find and assured that they were well grounded, including the main one off the battery.
Any ideas, guys ???
When one tries to start the "bad" one, nothing happens, no cranking, nothing. The starter will crank when jumpered on the solenoid. He seems to think that the safety switch has some sort of chip in it, although I see no evidence of that in the full manual that he has.
We ohmed out the black/yellow from the computer to the starter plug, disassembled the main plug on the computer connector and ohmed out all the wires we could, went through the safety switch and starter button, ohming procedure (he already bought a new starter button also, which we double checked) .. and all works as trouble shooting instructions indicate.
I have a background in HVAC, and pretty much understand wiring diagrams, etc., and am an engineer, and he's a fairly sharp guy too... but dang.... this just doesn't make sense to either of us.
I already read about "bad ground" previously posted, and he pulled all black wires he could find and assured that they were well grounded, including the main one off the battery.
Any ideas, guys ???