| Onan issues ... [message #174080] |
Wed, 20 June 2012 16:12  |
amdgmcman
Messages: 76
Registered: April 2007
Location: Long Beach, CA
Karma:
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Greetings,
In 2009 I was preparing to leave on an extended trip in my 78 Royale w/ 6k ONAN gen. I took it to Miguel at MGM to have work done and he as part of the service he replaced the circuit board on the gen with a used one out of a old Onan. It worked fine at first but when I got it home it would not start. I called and he told me to jumper numbers 9 and 11 on the board then jump the solenoid to start it. I left the 9-11 connection which kept it running then when I wanted to turn off the gen, I would remove the jumper and the gen would stop running. He said it was the oil sending unit that was bad.
I was running behind on my departure time for the trip, so I used this method to operate the gen on my trip. I continued to use this method to run the gen until recently the clips and wiring I was using to jumper it corroded and I made a new set to use. The old jumper had plastic/rubber over the clips to prevent unwanted grounding, but used bare clips for the replacement jumpers. I jumpered 9-11 then went to jumper the solenoid when one of the clips, came loose and touched the chassis. This caused the clip to weld itself to the chassis and by the time I was able to dislodge it I saw smoke running through the wiring and to the starter itself. The whole unit was totally dead at this point.
I have replaced the solenoid, bridge rectifier, oil sending unit, and starter, and the unit is still dead. EXCEPT ... I found out that the 12v hot wire running from the starter to the right side of the solenoid was dead so I replaced it and power is now running to the circuit board. The unit is still dead, but I notice that if I jumper the solenoid the starter will turn over, but the gen will not start. Have I wired the solenoid wrong? Do I need to replace all of the wiring in the starting system? (too big a job for me)! I have a GMC Motorhomes International Onan Operators Manual, but can’t find a wiring diagram for the solenoid. I believe when I replaced the solenoid I hooked up the wiring the same way as the old solenoid was wired, but I’m doubting myself at this point.
Boy … do I miss Duane Simmons (RIP) … any suggestions?
Thanks,
AMDGMCMan
Alan M DeLuccio
78 Royale with
Coachmen,Center Kitchen Floorplan
09 Harley Davidson Street Glide
65 Corvair Monza Convertible
96 RAV4 2 door Manual 4WD
Long Beach, CA
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