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[GMCnet] Onan no turn [message #247255]

Sat, 12 April 2014 15:13

Len Novak

Messages: 676
Registered: February 2004
Location: Las Vegas, NV

Karma: -3

Senior Member

I can't get the Onan to turn over from the switch on the Onan or in the
coach. No click from either switch. House battery power is fine. There is
power to the relay that runs the Onan fuel pump.

Tad baffled here.

Thanks,

Len and Pat

1978 GMC Kingsley

The Beast II with dash lights that work and labels you can see!

Fallbrook, CA new email: <mailto:B52Rule@Roadrunner.Com>
B52Rule@Roadrunner.Com

<http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375>
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375

<http://www.bdub.net/novak/> www.bdub.net/novak/

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Len and Pat Novak 1978 GMC Kingsley The Beast II with dash lights that work and labels you can see! Las Vegas, NV new email: B52sRule@Gmail.com http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375 www.bdub.net/novak/

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Re: [GMCnet] Onan no turn [message #247262 is a reply to message #247255]

Sat, 12 April 2014 15:48

Bob de Kruyff

Messages: 4260
Registered: January 2004
Location: Chandler, AZ

Karma: 1

Senior Member

Len Novak wrote on Sat, 12 April 2014 14:13

I would try to jump the large stud on the solenoid that goes directly to the starter with 12v to bypass eveything and check the starter itself. If it cranks, I would work backwards to see if the small stud on the solenoid activates it--I believe only one stud has a wire on it and it is a ground.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: [GMCnet] Onan no turn [message #247267 is a reply to message #247255]

Sat, 12 April 2014 17:34

Otterwan

Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...

Karma: 0

Senior Member

I would check your ground at both the Onan (back of the generator housing) and the coach. They get loose and corroded, and while they might be good enough run the fuel pump they can't handle the draw of the starter.

1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."

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Re: [GMCnet] Onan no turn [message #247285 is a reply to message #247267]

Sat, 12 April 2014 20:15

Len Novak

Messages: 676
Registered: February 2004
Location: Las Vegas, NV

Karma: -3

Senior Member

I went out there, test meter, wire brush, leads. Did nothing, fired right
up.

Len and Pat
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375

www.bdub.net/novak/

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of David Orders
Sent: Saturday, April 12, 2014 3:34 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Onan no turn

I would check your ground at both the Onan (back of the generator housing)
and the coach. They get loose and corroded, and while they might be good
enough run the fuel pump they can't handle the draw of the starter.
--
1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA -
"We may not be able to stop all evil in the world, but I know that how we
treat one another is entirely up to us."
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Re: [GMCnet] Onan no turn [message #247289 is a reply to message #247285]

Sat, 12 April 2014 20:33

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

Len,

That's the kind of thing that convinced me years ago to find a replacement.
After the Generac 36G didn't work out well, I wound up with the TroyBilt.
Now my only problem is the neighbors -- they don't seem to appreciate its
reliability as much as I do: At Sun'n'Fun last week, a nice little Asian
lady parked behind us came over to ask if I'd please move our toad. Seems
she wanted it between them and the Troy-Bilt since passing traffic made the
noise come and go pretty dramatically. They were much more friendly after
I complied. The neighbors beside us, who relied on solar panels for
electricity, and cooked their meals in a solar oven, never seemed to warm
to the Troy-Bilt. Don't know why they were at an air show, complete with
the Blue Angels and an F-22 and almost continuous aircraft overhead.

Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, & TroyBilt Generator, etc., etc.
www.gmcwipersetc.com

On Sat, Apr 12, 2014 at 9:15 PM, Len Novak wrote:

> I went out there, test meter, wire brush, leads. Did nothing, fired right
> up.
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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Re: [GMCnet] Onan no turn [message #247318 is a reply to message #247285]

Sun, 13 April 2014 00:59

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Len,

A couple of thoughts - your Onan has an intermittent fault or "The Beast" has morphed into a Gremlin!

Regards,
Rob M.

-----Original Message-----
From: Len Novak

I went out there, test meter, wire brush, leads. Did nothing, fired right up.

Len

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] Onan no turn [message #247324 is a reply to message #247285]

Sun, 13 April 2014 09:42

Bob de Kruyff

Messages: 4260
Registered: January 2004
Location: Chandler, AZ

Karma: 1

Senior Member

Len Novak wrote on Sat, 12 April 2014 19:15

""I went out there, test meter, wire brush, leads. Did nothing, fired right
up.

Len and Pat
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
Reminds me of a recent medical exam. You scared the heck out of it.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: [GMCnet] Onan no turn [message #247327 is a reply to message #247285]

Sun, 13 April 2014 12:31

Otterwan

Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...

Karma: 0

Senior Member

Len Novak wrote on Sat, 12 April 2014 18:15

I went out there, test meter, wire brush, leads. Did nothing, fired right
up.

Still sounds like a bad ground to me. I'd clean them any way.

1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."

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Re: [GMCnet] Onan no turn [message #247329 is a reply to message #247327]

Sun, 13 April 2014 15:34

Len Novak

Messages: 676
Registered: February 2004
Location: Las Vegas, NV

Karma: -3

Senior Member

I just cleaned all the grounds..............just in case. Did not see
anything out of the ordinary.

Len and Pat
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375

www.bdub.net/novak/

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of David Orders
Sent: Sunday, April 13, 2014 10:32 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Onan no turn

Len Novak wrote on Sat, 12 April 2014 18:15
> I went out there, test meter, wire brush, leads. Did nothing, fired
right
> up.

Still sounds like a bad ground to me. I'd clean them any way.

--
1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA -
"We may not be able to stop all evil in the world, but I know that how we
treat one another is entirely up to us."
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Re: [GMCnet] Onan no turn [message #247342 is a reply to message #247329]

Sun, 13 April 2014 19:48

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

The last one I had like that was the +12 volt cable. Its feeds from the starter down to the bottom of the case then through through a feed through bolt and nut arrangement to another heavy cable on the bottom. It then goes on to the starting battery if I remember correctly. That connection at the feed through and cables had corroded and was not making a good connection. I believe that feed through bolt was brass.

This was several years ago at a work rally in Hamilton. It could be anything but positive cables tend to corrode more than negative ground cables and that connection on the bottom is exposed to the road contamination.

Check the positive cables and especially check at the feed through. I forget where the negative (ground) connection is to the Onan and how it is routed.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] Onan no turn [message #247343 is a reply to message #247342]

Sun, 13 April 2014 20:01

Jim Miller

Messages: 501
Registered: March 2008

Karma: 10

Senior Member

HI Ken, the DC ground is typically through one of the lower two tie-bolts that hold the generator section together. The cable lug is clamped against the aluminum end-bell of the generator...a great place for dissimilar-metals corrosion to occur.

--Jim

On Apr 13, 2014, at 8:48 PM, Ken Burton wrote:

> Check the positive cables and especially check at the feed through. I forget where the negative (ground) connection is to the Onan and how it is routed.

--Jim "the pompous" Miller
1977 Eleganza II
1977 Royale
Hamilton, OH

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Jim Miller 1977 Eleganza II 1977 Royale Hamilton, OH

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Re: [GMCnet] Onan no turn [message #247346 is a reply to message #247343]

Sun, 13 April 2014 20:20

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

From your description that also sounds like a good place to be checking.

This problem may not be cables at all. It could easily be the starter relay of any of the connections going to it.

Since it is intermittent, cleaning cable connections is a good place to start looking while waiting for it to fail again.

Ken B.

Jim Miller wrote on Sun, 13 April 2014 20:01

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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