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Home » Public Forums » GMCnet » [GMCnet] I give up. (Onan)
Re: [GMCnet] I give up. (Onan) [message #190239 is a reply to message #190238] Wed, 14 November 2012 00:07 Go to previous messageGo to previous message
Robin Hood is currently offline  Robin Hood   United States
Messages: 1078
Registered: April 2011
Karma:
Senior Member
Oh wait I think I get it... It's not that the board gets its signal from
the VR, it's that a bad VR can drag down the signal the board gets from the
alternator?

That still leaves me with needing to know whether the two AC legs on the VR
get connected to each other electrically.

On Tuesday, November 13, 2012, Robin Hood wrote:

> Seen it. Doesn't answer my question though. Duane talked about wires being
> "together" and "in common" on a single terminal, but I see three blades for
> the spade connectors for three wires.
>
> If he just wanted the two AC wires identified and kept close to each other
> he should have worded it differently. Words mean things, and as written,
> his instructions don't match reality (two wires on one terminal) or make
> sense (connect two opposite legs of AC together???)
>
> It also doesn't explain why the control board is suddenly satisfied: the
> flywheel alternator feeds the VR which tells the control board that the
> engine is running. How does taking that signal away satisfy the control
> board?
>
> I'm tired and frustrated and out of my depth and I'm either faced with
> sloppy language or I'm committing a seeeeerious reading comprehension fail.
>
> On Tuesday, November 13, 2012, Dave Mumert wrote:
>
>> Hi Robin
>>
>> I thought I would beat Gene to the punch ;-)
>> Check on his site
>> http://gmcmotorhome.info/generator.html#ALTERNATOR
>>
>> That appears to leave the alternator connected between pins 8 and 11
>>
>> The wiring.jpg file on the DVD show the alternator connected between 8
>> and 5
>> ( 5 and 11 are connected by the fuse )
>>
>> Dave Mumert
>>
>> > That leaves the AC is-engine-running sensor as a likely culprit. There
>> are
>> > 3 terminated wires attaching to blades on the voltage regulator. One is
>> > labeled B+ (I assume it's battery positive) and the other two are
>> labeled
>> AC. I
>> > assume these are the two AC legs. Mr Simmons advice here is a bit
>> > ambiguous... He advised disconnecting the voltage regulator... But I'm
>> > unclear as to what to do with the wires. Am I supposed to connect the
>> two
>> > AC wires I just removed from the regulator TOGETHER as in electrically?
>> How
>> > is that safe if they're 2 different AC legs? And in what way does doing
>> any of
>> > this make the control board happy?
>> >
>> > I've read Simmons guide and studied the schematics and watched the DVD,
>> > but if anyone has help or advice all ears.
>> >
>> > Robin
>> >
>> >
>>
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>
>
> --
> Robin Hood
> Jackson, MS
> 2003 Buick Lesabre
> 1968 Pontiac Catalina
> 1978 GMC Royale motorhome
> 1977 GMC Palm Beach motorhome
>
>

--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
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