House batteries not charging, inverter stays on for only 3 seconds before clicking off, and water pump causes interior lights to dim while making unfamiliar noise.
No tripped breakers
Any idea what’s wrong?
2015 #Tiffin #AllegroBreeze
Inverter: Tripp-Lite Alternative Power Source RV750ULHW
This happened on the way home from a long trip. Doesn’t affect chassis System, only house.
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When engine is running, isolation relay closes to let the Chassis charging system also charge the house batteries. When relay is bad, no charging happens.
It is also used as the boost relay, so find it by hitting the boost switch on and off while listening for it to clunk.
As a test, If you hold the boost relay switch on, the house batteries should show higher voltage. If it clunk and no increase in volts, the relay is bad. Very common failure item.
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Join Date: Jan 2015
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Or, you have a bad high current fuse in that cable. My coach has a fuse on each end of that cable. They are typically 300 or 400 amps and can be made by bussman.
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DaveB, Raleigh, NC
2015 Tiffin RED 33AA, w/Honda CRV
VMSpc, Magnum BMK/ARC50