| No Volts Onan [message #305922] |
Wed, 24 August 2016 09:56  |
g.winger
Messages: 792
Registered: February 2008
Location: Warrenton,Missouri
Karma: 0
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As you might recall in my last post,,,, lost a coil in the heat on the way home and the onan ran for a couple min. and quit. Got a chance to work on it,,,,, no volts to the coil or fuel pump!!!! Am looking for a wiring diagram. Checked my factory manual,,,,nada????? Any leads on a diagram????
78 Roayale RB
507 caddy
hubler with a galvanized frame
And a partial Dash!!!
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| Re: No Volts Onan [message #305924 is a reply to message #305923] |
Wed, 24 August 2016 10:58  |
mghamms
Messages: 466
Registered: March 2016
Location: Ware, Massachusetts
Karma: 2
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Probably a really on the control board.
I had a similar problem. Ran a jumper from the battery to the coil and ran good.
I replaced the control board with the dinasour board about $135.00 runs great now.
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
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| Re: No Volts Onan [message #305927 is a reply to message #305922] |
Wed, 24 August 2016 12:24 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Follow Duane's troubleshooting steps.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] No Volts Onan [message #305929 is a reply to message #305924] |
Wed, 24 August 2016 12:33 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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You can always jump from 9-11 to overcome the bad board. I keep a jumper
cable by the gen. compartment for that use and felt pened the 9-11.
Also a very good opinion is the fuel primer switch that mounts on the
inside panel to prime the fuel before hitting the starter. Less grinding of
the starter.On our website under Onan Generator.
We provide several Dinosaur boards a week as the old ones are failing.
On Wed, Aug 24, 2016 at 8:58 AM, Mike Hamm wrote:
> Probably a really on the control board.
> I had a similar problem. Ran a jumper from the battery to the coil and ran
> good.
> I replaced the control board with the dinasour board about $135.00 runs
> great now.
> --
> 1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: No Volts Onan [message #305949 is a reply to message #305922] |
Wed, 24 August 2016 20:21 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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It's easy to remove the board for inspection. There may be a burnt trace or broken solder connections holding the faston tabs to the board. The fuse holder tabs are pretty wimpy and often get oxidized making no connection to the fuse.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: No Volts Onan [message #305957 is a reply to message #305922] |
Wed, 24 August 2016 23:10 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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If you PM me or email me your email address, I'll send you a copy of Colonel Ken's Onan wiring diagram. It is much easier to follow than the book one. Also do not be in a rush to replace that Onan board until you have proven it is really what is bad. While it is probably a problem on the board, there are lots of other things that could cause your problem. If the board is indeed bad get a new dinosaur from Jim K at Applied GMC. I use to fix them. I got tried of fixing them again and again. I finally said no more and replaced mine with a dinosaur board.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: No Volts Onan [message #305995 is a reply to message #305922] |
Fri, 26 August 2016 09:17 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Matt I've never wrenched on a "honey who shrunk the GMC 23". Would a gearwrench slip in to get the board cover screws loostened?
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: No Volts Onan [message #306001 is a reply to message #305995] |
Fri, 26 August 2016 10:36 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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JohnL455 wrote on Fri, 26 August 2016 10:17Matt I've never wrenched on a "honey who shrunk the GMC 23". Would a gearwrench slip in to get the board cover screws loostened?
Luck you John,
A 5/16 gearwench might help.
The back cover screw can be loosened to get the cover off with a 5/16 box, 1/6 of a turn at a time.
Then there is very little room to remove the 1/4" fason connections on the board.
If you need to get the board off, you need an angle/ratchet screw driver because the body is in the way to get a shot with any real screwdriver.
All the expected maintenance can be done on the slides, but anything past the coil is a bear.
I work hard to keep it running nicely and so far the effort has been rewarded. I do still need a fix for the push in dipstick. Teflon tape on the rubber stopper is temporary.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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