Home » Public Forums » GMCnet » [GMCnet] Identify electric device
| Re: [GMCnet] Identify electric device [message #327395 is a reply to message #327392] |
Thu, 21 December 2017 16:39   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Senior Member |
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Peer,
Sounds to me like the chassis battery diode in your isolator is shorted --
an unusual failure on a GMC. Disconnect the chassis battery lead at the
isolator as a preliminary confirmation. Then, without reconnecting to that
terminal, use an ohmmeter to measure between that terminal and the center
one. The resistance should be very low and the same when you reversed the
meter lead connections.
Ken H.
On Thu, Dec 21, 2017 at 5:12 PM, Peer Oliver Schmidt GMC <
posde@theinternet.de> wrote:
> Let me try to clear things up:
>
> When I take the house battery out of the coach, the lights of the house
> still work. Removing the house battery cable from the boost solenoid did
> not turn off the house lights. Removing the house battery cable from the
> isolator caused the lights to go off.
>
> This means to me, that the house battery circuit is receiving energy
> through the isolator from the chassis battery, something that should not
> happen.
>
> Feel free to correct me if I am wrong :-)
>
> --
> Best regards
>
> Peer Oliver Schmidt
> PGP Key ID: 0x83E1C2EA
>
> '76a Eleganza II 26', VA
> '73 Sequoia 23', Germany, SH
>
>
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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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