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Re: [GMCnet] ONAN starting about 2 K windings [message #321015 is a reply to message #320994]

Mon, 24 July 2017 20:56

Ken Henderson

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

Karma:

Senior Member

William,

It's about as much of a WAG as anything else, but at least it's based on a
little-known fact:

When you say you measure "at the start solenoid where the wire from K1
hooks on", I take it to mean at terminal "S" on the diagram and the
solenoid. Correct?

If so, and disconnecting at K1 means disconnecting the wire leading to "S",
then my hypothesis could be correct.

Unlike any other solenoid relay I've ever seen, the K1 relay has an
internal flexible (woven) jumper wire from one of its control terminals to
the main contact disc which makes the connection between the battery
terminals. That jumper does not appear on any Onan drawing I've seen, but
I added it to my re-drawn version. You can see it as a very thin line on
"KH Onan Wiring 170723". My hypothesis is that due to an internal failure
of some sort, that jumper is continuing to conduct after KI is
"disengaged". Since it's a small wire, it has a much higher resistance
than the main contacts, so only partial voltage is applied to the starter
solenoid, but enough to keep the already-engaged starter solenoid closed.

I'd start by measuring the open circuit resistance across the K1 relay's
main contacts. Then, I'd probably disassemble that relay, as I did to
learn of the jumper back in 2000 or so, to see if everything's kosher
inside.

Rots a Ruck!

Ken H.
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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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[Message index]

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		Re: [GMCnet] ONAN starting By: James Hupy on Fri, 21 July 2017 14:49
		Re: [GMCnet] ONAN starting By: William Shourt on Fri, 21 July 2017 18:15
		Re: [GMCnet] ONAN starting By: Carl S. on Fri, 21 July 2017 19:09
		Re: [GMCnet] ONAN starting By: William Shourt on Fri, 21 July 2017 19:17
		Re: ONAN starting By: lqqkatjon on Fri, 21 July 2017 22:35
		Re: ONAN starting By: Ken Burton on Sat, 22 July 2017 04:11
		Re: [GMCnet] ONAN starting By: Mr ERFisher on Sat, 22 July 2017 04:49
		Re: [GMCnet] ONAN starting By: William Shourt on Sat, 22 July 2017 07:51
		Re: [GMCnet] ONAN starting By: Ken Burton on Sat, 22 July 2017 10:54
		Re: [GMCnet] ONAN starting By: Bullitthead on Sat, 22 July 2017 13:29
		Re: [GMCnet] ONAN starting By: William Shourt on Sat, 22 July 2017 14:07
		Re: [GMCnet] ONAN starting By: Bullitthead on Sat, 22 July 2017 14:48
		Re: [GMCnet] ONAN starting By: William Shourt on Sat, 22 July 2017 13:46
		Re: [GMCnet] ONAN starting By: Ken Henderson on Sat, 22 July 2017 18:00
		Re: [GMCnet] ONAN starting By: Bullitthead on Sat, 22 July 2017 19:09
		Re: [GMCnet] ONAN starting By: bwevers on Sat, 22 July 2017 20:32
		Re: [GMCnet] ONAN starting By: Ken Henderson on Sat, 22 July 2017 22:51
		Re: [GMCnet] ONAN starting By: Ken Henderson on Sun, 23 July 2017 09:53
		Re: [GMCnet] ONAN starting By: William Shourt on Sun, 23 July 2017 18:17
		Re: [GMCnet] ONAN starting By: Guy Lopes on Tue, 25 July 2017 00:51
		Re: [GMCnet] ONAN starting By: Bruce Hart on Tue, 25 July 2017 05:59
		Re: [GMCnet] ONAN starting By: Ken Henderson on Tue, 25 July 2017 06:09
		Re: [GMCnet] ONAN starting By: jimk on Tue, 25 July 2017 10:03
		Re: [GMCnet] ONAN starting By: William Shourt on Tue, 25 July 2017 13:23
		Re: [GMCnet] ONAN starting By: William Shourt on Tue, 25 July 2017 13:29
		Re: [GMCnet] ONAN starting By: William Shourt on Tue, 25 July 2017 13:32
		Re: [GMCnet] ONAN starting By: William Shourt on Tue, 25 July 2017 14:19
		Re: [GMCnet] ONAN starting By: Ken Burton on Tue, 25 July 2017 15:11
		Re: [GMCnet] ONAN starting By: Emery Stora on Tue, 25 July 2017 20:30
		Re: [GMCnet] ONAN starting By: Ken Henderson on Tue, 25 July 2017 21:15
		Re: [GMCnet] ONAN starting By: William Shourt on Sat, 22 July 2017 07:57
		Re: ONAN starting By: lqqkatjon on Sat, 22 July 2017 15:32
		Re: ONAN starting By: Ken Burton on Sat, 22 July 2017 20:14
		Re: ONAN starting By: JohnL455 on Sun, 23 July 2017 16:34
		Re: ONAN starting By: JohnL455 on Sun, 23 July 2017 16:38
		Re: ONAN starting By: Ken Burton on Sun, 23 July 2017 21:17
		Re: [GMCnet] ONAN starting By: William Shourt on Sun, 23 July 2017 23:09
		Re: [GMCnet] ONAN starting By: Ken Henderson on Sun, 23 July 2017 23:35
		Re: ONAN starting about 2 K windings By: Matt Colie on Mon, 24 July 2017 09:28
		Re: [GMCnet] ONAN starting about 2 K windings By: William Shourt on Mon, 24 July 2017 13:26
		Re: [GMCnet] ONAN starting about 2 K windings By: Ken Henderson on Mon, 24 July 2017 20:56
		Re: [GMCnet] ONAN starting about 2 K windings By: Bullitthead on Mon, 24 July 2017 23:15
		Re: [GMCnet] ONAN starting about 2 K windings By: William Shourt on Mon, 24 July 2017 23:23
		Re: ONAN starting about 2 K windings By: Ken Burton on Mon, 24 July 2017 23:19
		Re: ONAN starting about 2 K windings By: Ken Burton on Tue, 25 July 2017 01:15
		Re: [GMCnet] ONAN starting about 2 K windings By: Ken Henderson on Tue, 25 July 2017 06:14
		Re: ONAN starting By: bwevers on Tue, 25 July 2017 00:22

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