Home » Public Forums » GMCnet » No Charging, light off in RUN, light on in ACCESSORY (How does this sound?)
| Re: [GMCnet] No Charging, light off in RUN, light on in ACCESSORY [message #322068 is a reply to message #322065] |
Mon, 14 August 2017 10:54   |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma:
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Senior Member |
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Do you have an APC cable
On Mon, Aug 14, 2017 at 8:49 AM Dan Wallace
wrote:
> Every few days, I take the Chief out for about 15 miles - Up and down the
> freeway -- to see what breaks. When I finally get it ready to camp most of
> the running bugs should be swatted.
>
> Last night, the coughed and died a couple of blocks from home. The
> battery voltage dropped below the Pertronix module's ignition level.
>
> To get it home, I fired up the Honda and jumped the systems.
>
>
> Here's what I found:
>
> Engine running at the stock isolator:
>
> Nothing worth counting (~0 VDC)at the alternator terminal on the isolator
> (Random, spurious voltages due to the high-impedance DMM)
> 12.6 VDC at the house side
> 10.8 at the chassis side
>
> The GENERATOR light:
> Illuminates in the ACCESSORY position
> Does not illuminate in the RUN position (engine running or not)
>
> I might not have tine to look at it today, but as I eat my lunch, looking
> at the schematic, here are my guesses:
>
> 1) The exciter wire lost connection with the alternator.
>
> OR
>
> 2) The field or (field connection)in the alternator is open.
>
> Here is my reasoning:
>
> The generator is not charging because the field is not excited.
>
> The GENERATOR indicator illuminates in ACCESSORY, because the ACCESSORY
> feed to the bulb is ground seeking through the bulb (and resistor) to
> un-powered loads connected to IGNITION 1.
>
> The GENERATOR indicator does not illuminate in RUN, because, without the
> field load, the ACCESSORY and IGNITION 1 feeds are at the same potential.
> So,
> no current flows through the bulb (and resistor).
>
>
> I ask those of you with more experience, other ideas?
>
> I'll post what I find, but it may be a few days.
>
>
>
>
>
>
>
>
>
> --
> Dan Wallace
> Detroit Metro
> 1974 Canyon Lands 260
> Headers, 3.55, 16"
> Floor plan 26-9
>
>
> _______________________________________________
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>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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No Charging, light off in RUN, light on in ACCESSORY
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Re: [GMCnet] No Charging, light off in RUN, light on in ACCESSORY
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Re: No Charging, light off in RUN, light on in ACCESSORY
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Re: No Charging, light off in RUN, light on in ACCESSORY
By: roy1 on Mon, 14 August 2017 11:08 |
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Re: No Charging, light off in RUN, light on in ACCESSORY
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Re: No Charging, light off in RUN, light on in ACCESSORY
By: JohnL455 on Mon, 14 August 2017 11:34 |
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Re: No Charging, light off in RUN, light on in ACCESSORY
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SOLVED - No Charging, light off in RUN, light on in ACCESSORY - No Field.
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Re: [GMCnet] SOLVED - No Charging, light off in RUN, light on in ACCESSORY - No Field.
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