Onan Remote Wiring

Carl Stouffer

Carl Stouffer

Well-known member
Jan 15, 2009
4,695
384
83
Tucson, Arizona 85718
The past two weekends and evenings in between, I have been swapping out my old, dependable, but high hour Onan Power drawer for a "fully
reconditioned" one that came from Kerry Tandy's coach, through Steve Ferguson. Should be 'plug-n-play' right? Not really. There were several minor
problems with the 'new' one that I spent numerous hours fixing, but the main issue was the remote start wiring.

After hooking it up the way it was originally (I thought), it didn't work. A number of things were not right on the connections to the control board,
but I was able to figure that out from the manual. The next issue was that the color codes on the end going into the coach, were different. With a
lot of help from my son and a multi meter, we finally got it right and everything works the way it is supposed to.

My question concerns the wire that provides power to the Hobbs meter and the switch light. On both generators, this wire had a ring terminal on it
and was connected to the + terminal on the coil. The wiring diagram shows it connected to pin #6 on the control board. Is there a preference on this
connection? It seems to work properly either way, even with the prime circuit.

Thanks,

--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
 
> The past two weekends and evenings in between, I have been swapping out my old, dependable, but high hour Onan Power drawer for a "fully
> reconditioned" one that came from Kerry Tandy's coach, through Steve Ferguson. Should be 'plug-n-play' right? Not really. There were several
> minor problems with the 'new' one that I spent numerous hours fixing, but the main issue was the remote start wiring.
>
> After hooking it up the way it was originally (I thought), it didn't work. A number of things were not right on the connections to the control
> board, but I was able to figure that out from the manual. The next issue was that the color codes on the end going into the coach, were different.
> With a lot of help from my son and a multi meter, we finally got it right and everything works the way it is supposed to.
>
> My question concerns the wire that provides power to the Hobbs meter and the switch light. On both generators, this wire had a ring terminal on
> it and was connected to the + terminal on the coil. The wiring diagram shows it connected to pin #6 on the control board. Is there a preference on
> this connection? It seems to work properly either way, even with the prime circuit.
>
> Thanks,

Pin 6. Everything to the remote panel goes to a board pin. The Onan engineers knew what they were doing. Don't deviate from that.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
 
Carl,

Whether you connect to the board or a connected device matters almost as
much as whether you tie your shoes overhand or underhand. But be sure you
connect to the correct location. Pin 6 is definitely NOT that. Pin 9
would be OK, but that connects directly to Coil +, so why not stick with
that?
http://www.gmcmhphotos.com/photos/onan/p39734-kh-redrawn-onan-schematic.html

Ken H.

> The past two weekends and evenings in between, I have been swapping out my
> old, dependable, but high hour Onan Power drawer for a "fully
> reconditioned" one that came from Kerry Tandy's coach, through Steve
> Ferguson. Should be 'plug-n-play' right? Not really. There were several
> minor
> problems with the 'new' one that I spent numerous hours fixing, but the
> main issue was the remote start wiring.
>
> After hooking it up the way it was originally (I thought), it didn't
> work. A number of things were not right on the connections to the control
> board,
> but I was able to figure that out from the manual. The next issue was
> that the color codes on the end going into the coach, were different. With
> a
> lot of help from my son and a multi meter, we finally got it right and
> everything works the way it is supposed to.
>
> My question concerns the wire that provides power to the Hobbs meter and
> the switch light. On both generators, this wire had a ring terminal on it
> and was connected to the + terminal on the coil. The wiring diagram shows
> it connected to pin #6 on the control board. Is there a preference on this
> connection? It seems to work properly either way, even with the prime
> circuit.
>
> Thanks,
>
>
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive,
> Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American
> Eagles,
> Solar battery charging. GMCSJ and GMCMI member
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Since you are quoting it and showing it. Why not correct it ?

On Mon, May 29, 2017 at 4:48 PM Ken Henderson
wrote:

> Carl,
>
> Whether you connect to the board or a connected device matters almost as
> much as whether you tie your shoes overhand or underhand. But be sure you
> connect to the correct location. Pin 6 is definitely NOT that. Pin 9
> would be OK, but that connects directly to Coil +, so why not stick with
> that?
>
> http://www.gmcmhphotos.com/photos/onan/p39734-kh-redrawn-onan-schematic.html
>
> Ken H.
>
>

>
> > The past two weekends and evenings in between, I have been swapping out
> my
> > old, dependable, but high hour Onan Power drawer for a "fully
> > reconditioned" one that came from Kerry Tandy's coach, through Steve
> > Ferguson. Should be 'plug-n-play' right? Not really. There were
> several
> > minor
> > problems with the 'new' one that I spent numerous hours fixing, but the
> > main issue was the remote start wiring.
> >
> > After hooking it up the way it was originally (I thought), it didn't
> > work. A number of things were not right on the connections to the
> control
> > board,
> > but I was able to figure that out from the manual. The next issue was
> > that the color codes on the end going into the coach, were different.
> With
> > a
> > lot of help from my son and a multi meter, we finally got it right and
> > everything works the way it is supposed to.
> >
> > My question concerns the wire that provides power to the Hobbs meter and
> > the switch light. On both generators, this wire had a ring terminal on
> it
> > and was connected to the + terminal on the coil. The wiring diagram
> shows
> > it connected to pin #6 on the control board. Is there a preference on
> this
> > connection? It seems to work properly either way, even with the prime
> > circuit.
> >
> > Thanks,
> >
> >
> > --
> > Carl Stouffer
> > '75 ex Palm Beach
> > Tucson, AZ.
> > Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive,
> > Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American
> > Eagles,
> > Solar battery charging. GMCSJ and GMCMI member
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://bdub.net/gmcmotorhome.info/
Alternator Protection Cable
http://bdub.net/gmcmotorhome.info/APC.html
 
Remind me again where the error is -- I checked functionality & then forgot
the actual connection while hunting the program I used to create it. :-(

Thanks,

Ken

> Since you are quoting it and showing it. Why not correct it ?
>
>
> On Mon, May 29, 2017 at 4:48 PM Ken Henderson

>
> > Carl,
> >
> > Whether you connect to the board or a connected device matters almost as
> > much as whether you tie your shoes overhand or underhand. But be sure
> you
> > connect to the correct location. Pin 6 is definitely NOT that. Pin 9
> > would be OK, but that connects directly to Coil +, so why not stick with
> > that?
> >
> > http://www.gmcmhphotos.com/photos/onan/p39734-kh-redrawn-
> onan-schematic.html
> >
> > Ken H.
> >
> >
> > On Mon, May 29, 2017 at 7:20 PM, Carl Stouffer

> >
> > > The past two weekends and evenings in between, I have been swapping out
> > my
> > > old, dependable, but high hour Onan Power drawer for a "fully
> > > reconditioned" one that came from Kerry Tandy's coach, through Steve
> > > Ferguson. Should be 'plug-n-play' right? Not really. There were
> > several
> > > minor
> > > problems with the 'new' one that I spent numerous hours fixing, but the
> > > main issue was the remote start wiring.
> > >
> > > After hooking it up the way it was originally (I thought), it didn't
> > > work. A number of things were not right on the connections to the
> > control
> > > board,
> > > but I was able to figure that out from the manual. The next issue was
> > > that the color codes on the end going into the coach, were different.
> > With
> > > a
> > > lot of help from my son and a multi meter, we finally got it right and
> > > everything works the way it is supposed to.
> > >
> > > My question concerns the wire that provides power to the Hobbs meter
> and
> > > the switch light. On both generators, this wire had a ring terminal on
> > it
> > > and was connected to the + terminal on the coil. The wiring diagram
> > shows
> > > it connected to pin #6 on the control board. Is there a preference on
> > this
> > > connection? It seems to work properly either way, even with the prime
> > > circuit.
> > >
> > > Thanks,
> > >
> > >
> > > --
> > > Carl Stouffer
> > > '75 ex Palm Beach
> > > Tucson, AZ.
> > > Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final
> drive,
> > > Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American
> > > Eagles,
> > > Solar battery charging. GMCSJ and GMCMI member
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> > >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://bdub.net/gmcmotorhome.info/
> Alternator Protection Cable
> http://bdub.net/gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
> Carl,
>
> Whether you connect to the board or a connected device matters almost as
> much as whether you tie your shoes overhand or underhand. But be sure you
> connect to the correct location. Pin 6 is definitely NOT that. Pin 9
> would be OK, but that connects directly to Coil +, so why not stick with
> that?
> http://www.gmcmhphotos.com/photos/onan/p39734-kh-redrawn-onan-schematic.html
>
> Ken H.
>
>

>
>
> > My question concerns the wire that provides power to the Hobbs meter and
> > the switch light. On both generators, this wire had a ring terminal on it
> > and was connected to the + terminal on the coil. The wiring diagram shows
> > it connected to pin #6 on the control board. Is there a preference on this
> > connection? It seems to work properly either way, even with the prime
> > circuit.
> >
> > Thanks,
> >
> >
> > --
> > Carl Stouffer
> > '75 ex Palm Beach
> > Tucson, AZ.
> > Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive,
> > Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American
> > Eagles,
> > Solar battery charging. GMCSJ and GMCMI member
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

That makes perfect sense, Ken (except for the part that pin 6 is definitely NOT it, since the diagram in the manual shows the connection to pin 6).
The generators, both of them, were wired to the coil from the factory, by Onan.

Unfortunately for me, the harness was cut just below the plug on the Onan side, and the plug had been bypassed on the other end. There were bits of
wire on the butt connectors, but they didn't seem to match up to my wiring. My coach is a '75, and Kerry's is a ?? so there was evidently a
difference in the harness going to the remote panel.

Thanks,


--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
 
> That makes perfect sense, Ken (except for the part that pin 6 is definitely NOT it, since the diagram in the manual shows the connection to pin
> 6). The generators, both of them, were wired to the coil from the factory, by Onan.
>
> Unfortunately for me, the harness was cut just below the plug on the Onan side, and the plug had been bypassed on the other end. There were bits
> of wire on the butt connectors, but they didn't seem to match up to my wiring. My coach is a '75, and Kerry's is a ?? so there was evidently a
> difference in the harness going to the remote panel.
>
> Thanks,

Its a good day for me. I got one on Mr. Henderson.

Pin 6 goes to the Hobbs meter and the light (run indicator) on the remote switch.

Pin 9 powers the fuel pump and the ignition and the fuel shut-off solenoid.

Both have 12V only when running, but the manual says what I says.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
 
Carl,

By Golly, you're right! Onan's diagram DOES show 6=9 and I've got it
connected to CR5+CR7+R2 -- an obvious error I've propagated for the past
15+ years (without previous complaint). There's another error too, less
egregious than this one, that I'm hoping Mr. ERF will remind me of again.
Guess I had even more trouble reading the Onan schematic than I realized!
I'll try to find the program I used to create that drawing and correct it.

By the way, when I had an Onan, I rewired it using about 1/3 the OEM wire
-- there are a lot of, IMHO, dumb connections on there -- even without
changing any of the functionality. Some places I found 18" of wire where
6" was more than adequate.

Ken H.

​O​

> ​...
>
> That makes perfect sense, Ken (except for the part that pin 6 is
> definitely NOT it, since the diagram in the manual shows the connection to
> pin 6).
> The generators, both of them, were wired to the coil from the factory, by
> Onan.
>
> Unfortunately for me, the harness was cut just below the plug on the Onan
> side, and the plug had been bypassed on the other end. There were bits of
> wire on the butt connectors, but they didn't seem to match up to my
> wiring. My coach is a '75, and Kerry's is a ?? so there was evidently a
> difference in the harness going to the remote panel.
>
>
 
Ken, both the circuit board and the wiring harness are 'one size fits several'. Not your fave but Onan saved a nickle doing that.
And, the Hobbs clock and Run light want twelve volts when the set is operating. Get it where you can.

--johnny

--
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" - ol Andy, paraphrased
 
> Carl,
>
> By Golly, you're right! Onan's diagram DOES show 6=9 and I've got it
> connected to CR5+CR7+R2 -- an obvious error I've propagated for the past
> 15+ years (without previous complaint). There's another error too, less
> egregious than this one, that I'm hoping Mr. ERF will remind me of again.
> Guess I had even more trouble reading the Onan schematic than I realized!
> I'll try to find the program I used to create that drawing and correct it.
>
> By the way, when I had an Onan, I rewired it using about 1/3 the OEM wire
> -- there are a lot of, IMHO, dumb connections on there -- even without
> changing any of the functionality. Some places I found 18" of wire where
> 6" was more than adequate.
>
> Ken H.
>
> ​O​

>
> > ​...
> >
> > That makes perfect sense, Ken (except for the part that pin 6 is
> > definitely NOT it, since the diagram in the manual shows the connection to
> > pin 6).
> > The generators, both of them, were wired to the coil from the factory, by
> > Onan.
> >
> > Unfortunately for me, the harness was cut just below the plug on the Onan
> > side, and the plug had been bypassed on the other end. There were bits of
> > wire on the butt connectors, but they didn't seem to match up to my
> > wiring. My coach is a '75, and Kerry's is a ?? so there was evidently a
> > difference in the harness going to the remote panel.
> >
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

Ken,

I guess if a guy with your knowledge and qualifications had trouble reading the Onan schematic, I can see why I was COMPLETELY lost. My dad was an
EE, but it definitely didn't rub off on me! I guess I'll connect the wire in question to pin 6. The only reason I asked was that it seems like there
was a pulse in the voltage on the + side of the coil when reading it with the VOM. Maybe it won't make any difference. Just seems strange that GM
says to connect it to pin 6 and Onan wired it directly to the coil.
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
 
> Ken,
> I guess if a guy with your knowledge and qualifications had trouble reading the Onan schematic, I can see why I was COMPLETELY lost. My dad was
> an EE, but it definitely didn't rub off on me! I guess I'll connect the wire in question to pin 6. The only reason I asked was that it seems like
> there was a pulse in the voltage on the + side of the coil when reading it with the VOM. Maybe it won't make any difference. Just seems strange
> that GM says to connect it to pin 6 and Onan wired it directly to the coil.

Onan never connected it to the coil. Onan connected it to pin 6. Someone who worked on it after it came from the factory stuck it on the coil.

The 6 pins across the top of the board are for the remote panel.

1 is ground.
2 is start.
3 is stop.
4 is not used in our application.
5 is for a battery condition meter.
6 is for the "generator running" indicator and the Hobbs meter.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
 
> > Ken,
> > I guess if a guy with your knowledge and qualifications had trouble reading the Onan schematic, I can see why I was COMPLETELY lost. My dad
> > was an EE, but it definitely didn't rub off on me! I guess I'll connect the wire in question to pin 6. The only reason I asked was that it seems
> > like there was a pulse in the voltage on the + side of the coil when reading it with the VOM. Maybe it won't make any difference. Just seems
> > strange that GM says to connect it to pin 6 and Onan wired it directly to the coil.
>
> Onan never connected it to the coil. Onan connected it to pin 6. Someone who worked on it after it came from the factory stuck it on the coil.
>
> The 6 pins across the top of the board are for the remote panel.
>
> 1 is ground.
> 2 is start.
> 3 is stop.
> 4 is not used in our application.
> 5 is for a battery condition meter.
> 6 is for the "generator running" indicator and the Hobbs meter.


Not as far as I can tell. Both Onans had the pin 6 wire connected to the coil with an un-modified wiring harness, exactly the same way. Sure looked
like a factory installation to me.

--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
 
> Not as far as I can tell. Both Onans had the pin 6 wire connected to the coil with an un-modified wiring harness, exactly the same way. Sure
> looked like a factory installation to me.

I have only messed with three Onans. All were wired as I outlined above. And it is pretty clear that the top row on the board is/was intended for the
remote panel connection.

I suppose there could have been deviations on the assembly line for one reason or another.

I had to install the Onan in the Sequoia with nothing to go on but factory documentation. I never saw anything that would make me think to connect the
Hobbs meter/run indicator to the coil. I have three different Onan manuals (6kw, 4kw ops/parts and 4kw major service). Not one of them shows anything
on the remote panel going anywhere but the top row of the control board.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
 
I've installed the 'contractor' version (different manifolds, a bit taller and higher output, 120/240 alternator, in remoted stuff. With the feed
taken off the coil factory new.

--johnny
--
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" - ol Andy, paraphrased
 
On my 77 the wire colors were not the same at both ends. The PO had run SO cable the last few feet to the Onan (mess). I cut back to about 4" where
the remote wires come through the grommet into the Onan compartment. Then got marine multi conductor control wire at West Marine and used melt butt
splices with shrink over the entire splice. I used a meter to trace and wrote up a new cheat sheet then dressed everthing around the rear as factory.
This should never need attention again in our lifetimes.
--
John Lebetski
Woodstock, IL
77 Eleganza II
 
> I've installed the 'contractor' version (different manifolds, a bit taller and higher output, 120/240 alternator, in remoted stuff. With the feed
> taken off the coil factory new.
>
> --johnny

Thank you Johnny! I knew I wasn't going crazy. ;)

--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
 
One of the (very few) positive things about the Junkerac I removed was the keyed Molex connector for the remote panel.

--johnny
--
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" - ol Andy, paraphrased
 
> I've installed the 'contractor' version (different manifolds, a bit taller and higher output, 120/240 alternator, in remoted stuff. With the feed
> taken off the coil factory new.
>
> --johnny

I haven't stared at the schematic for the Onan board long enough to know reality, but two things I know: One is that pin 6 should only have 12VDC on
it when the generator has reached speed (and the board thinks it is running). The second is that the coil + has 12VDC on it as soon as the start
switch is pressed. Without looking at the schematic, the coil + and pin 6 might be electrically identical. But...

It doesn't seem right that the "run" indicator lamp should come on as soon as the start switch is engaged. It will if it is wired to the coil. It
should come on after the flywheel alternator spins up.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
 
> I haven't stared at the schematic for the Onan board long enough to know reality, but two things I know: One is that pin 6 should only have 12VDC
> on it when the generator has reached speed (and the board thinks it is running). The second is that the coil + has 12VDC on it as soon as the start
> switch is pressed. Without looking at the schematic, the coil + and pin 6 might be electrically identical. But...
>
> It doesn't seem right that the "run" indicator lamp should come on as soon as the start switch is engaged. It will if it is wired to the coil. It
> should come on after the flywheel alternator spins up.

OK. I stared at the schematic. The coil + is the same as pin 9. And that is NOT the same as pin 6. Pin 9 will indicate that the Onan is running as
soon as the start switch is engaged. And that is not correct.

I don't really care if it is picking at nits, and I don't care if Onan sometimes wired them to the coil + (pin 9). The run indicator and Hobbs meter
belong on pin 6. All their documentation I have says so.

Unless someone can point me at Onan documentation that shows the run indicator and/or Hobbs meter on anything other than pin 6, and why it was done,
it is wired wrong. It might have even come from the factory that way. Run indicator lit as soon as starter is engaged is wrong.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
 
A.,

I don't know what Onan schematic you're looking at, 'cause the one I see in
the Onan manual, page 30, shows pins 6 & 9 directly connected to the fuel
solenoid, the fuel pump, and the coil. I posted a very roughly hi-lited
copy at:
https://drive.google.com/file/d/0B3XquSIYjDleZjRiOEwyN1NxeXM/view?usp=sharing

Have you found a different version?

Ken H.

> > I haven't stared at the schematic for the Onan board long enough to know
> reality, but two things I know: One is that pin 6 should only have 12VDC
> > on it when the generator has reached speed (and the board thinks it is
> running). The second is that the coil + has 12VDC on it as soon as the start
> > switch is pressed. Without looking at the schematic, the coil + and pin
> 6 might be electrically identical. But...
> >
> > It doesn't seem right that the "run" indicator lamp should come on as
> soon as the start switch is engaged. It will if it is wired to the coil. It
> > should come on after the flywheel alternator spins up.
>
> OK. I stared at the schematic. The coil + is the same as pin 9. And that
> is NOT the same as pin 6. Pin 9 will indicate that the Onan is running as
> soon as the start switch is engaged. And that is not correct.
>
> I don't really care if it is picking at nits, and I don't care if Onan
> sometimes wired them to the coil + (pin 9). The run indicator and Hobbs
> meter
> belong on pin 6. All their documentation I have says so.
>
> Unless someone can point me at Onan documentation that shows the run
> indicator and/or Hobbs meter on anything other than pin 6, and why it was
> done,
> it is wired wrong. It might have even come from the factory that way. Run
> indicator lit as soon as starter is engaged is wrong.
> --
> 73 23' Sequoia 4 Sale
> 73 23' CanyonLands Parts Unit 4 Sale
> Upper Alabama
> "Every day I become more convinced that I am the only person left on the
> planet that recognizes nonsense for what it is."
>
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