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Remote Onan primer switch [message #367333] Wed, 27 October 2021 14:45 Go to next message
Bruce Hart is currently offline  Bruce Hart   United States
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
Senior Member
Installed a primer switch on the inside remote panel. Activated the primer switch, start switch and Onan fires right up. When I release the prime switch the Onan dies. I have compared my wiring to the write up on following article:

http://gmcmotorhome.info/onan.htm

Thinking that it could be a bad start/stop I replaced it and got same results.

Any ideas from the crowd?

Powered the primer switch from exterior light switch just inside door(Purple wire).
Remote Onan switch has a run meter and no battery condition meter. On the control board # 5 pin has a wire connected to it and not to #6 which manual and tech write up suggests.

Power Drawer Operators Manual page 8 and 9


Bruce Hart 1976 Palm Beach 1977 28' Kingsley La Grange, Wyoming
Re: Remote Onan primer switch [message #367334 is a reply to message #367333] Wed, 27 October 2021 16:49 Go to previous message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Bruce,

That Prime button by-passes all the system safeties the Onan has. It could be that the LOP switch isn't making up or the flywheel isn't powering the board. Those are the two most likely, it seems. They are easy to test out at the control board. Nothing has to be defective, just a bad (40+yo) connection can stop it from running.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
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