My Class A Southwind has an issue recently that the generator AND shore power will only work if the chassis engine is running. Once I turn off the engine, within 30 seconds any shore power or generator will be cut off and no power is available for the coach.

Are you talking 120V power, or 12V power, or both?If 12V power, I would check the house battery disconnect and the house battery connections (and the house battery itself). Some converters won't work properly if they don't have a battery connected. So long as the engine is running, the battery isolation system keeps the chassis battery connected to the house 12V system and all works as expected.If 120V AC power, I am clueless.

Al, I'm with Drew here. What you say makes no sense and basically can't happen. I suspect that the real lead issue is semantics and vocabulary.Please take the time to describe the situation in as great a detail as you can. Tell us what does work and what not work and when and I will bet that someone here can point you to a place to look. Before the depression, I got to do this a lot by VHF one part at a time. We can do this.Matt

I would like to hear a better description of the problem also.

you have NO 12v house powerhouse batteries are dead or disconnected and the converter (which runs from the 120v) is not charging, possibilitiesblown charge fusecircuit breaker for converter is trippedconverter has died, will not output any DC powerconverter got unplugged in the electrical bayin all cases there is NO 12v power to the DC coil in the transfer switchso the switch/relay releases aka opens contacts and shuts off the 120v incomingis this RV 50 amp or 30amp50amp has double coils/relays30amp has single coil/relay and should supply power from generator or shore powerone mode or the other will be default and work on a 30amp regardless of battery situation

I believe the transfer switch relay is powered by 120 VAC. It is energized by the 120 VAC coming from the shore power or the generator output.

Shore Power Only Works When Engine Is On | Good Sam Community

12 Replies

Matt_Colie
Explorer II
Aug 18, 2015
Al,

I'm with Drew here. What you say makes no sense and basically can't happen. I suspect that the real lead issue is semantics and vocabulary.

Please take the time to describe the situation in as great a detail as you can. Tell us what does work and what not work and when and I will bet that someone here can point you to a place to look.

Before the depression, I got to do this a lot by VHF one part at a time. We can do this.

Matt
DrewE
Explorer II
Aug 18, 2015
Are you talking 120V power, or 12V power, or both?

If 12V power, I would check the house battery disconnect and the house battery connections (and the house battery itself). Some converters won't work properly if they don't have a battery connected. So long as the engine is running, the battery isolation system keeps the chassis battery connected to the house 12V system and all works as expected.

If 120V AC power, I am clueless.

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Shore Power Only Works When Engine Is On

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