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Old 05-15-2020, 02:19 PM   #1
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Location: Kent, WA
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Help with battery charging

I am guessing this has been addressed before, but after a few days of searching the forums I canít find what Iím looking for.

My issue:

My coach batteries will not charge with the engine running. They do charge when on shore and generator power.

My chassis battery charges at 14.2 it an idle - coach batteries are at 12.7.

I have a 2004 Seabreeze 8341LX - workhorse chassis. Only 11,000 miles.

There has to be a relay somewhere that is not working.

Things Iíve checked.
  • Checked for burned wires in transfer switch box.
  • Checked for tripped breakers in the service panel
  • Checked circuit breakers and wiring in the 12v Distribution panel
  • Check coach and chassis battery voltage while plugged into shore power
  • checked battery voltage while engine running and unplugged from shore power.
Again - Iím thinking it must be something simple - Iím a well accomplished mechanic - but some of this stuff is hidden and finding circuit diagrams is like seeing a mermaid.

Coach and chassis batteries are brand new.

Thanks for the help
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Old 05-15-2020, 02:36 PM   #2
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Sounds like your interconnect solenoid is not working.
link below has information that may help you.
https://www.irv2.com/forums/f105/doe...es-417955.html
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Old 05-15-2020, 02:39 PM   #3
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If you have a boost start switch, push it on and off. If you hear a solenoid clunking, that's the one that's bad. It serves dual duty with a charging solenoid.

They clunk but don't make contact internally. Very common problem.
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Old 05-16-2020, 07:59 PM   #4
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Google 111979 battery control center . You will find a trouble shooting guide for the charging system .
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Old 05-16-2020, 11:38 PM   #5
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Thank you all for helping! I have lots of information to Use now!
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