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Old 10-23-2022, 01:17 AM   #1
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Brand: Thor Motor Coach
Model: 2012 Serrano
State: Washington
Posts: 7
THOR #10232
electrical mystery

I have a 2012 Serrano and am having an odd and annoying electrical issue. After driving for an hour or two when I shut off the engine the 100 amp breaker to the coach batteries trips. I've had 4 "professional" repair places check it and they have no ideas. In their defense it only does it about 1/2 the time. I go to the battery compartment , flip the breaker and all is well.
Originally it would only trip when I used the leveling jacks but lately it will do it just by shutting off the engine. So I no longer think the jacks are the issue. I've replaced the actual breaker, checked all grounds/connections and have all (8) new batteries. House and chassis. Super annoying to say the least. Any ideas? thanks

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Old 10-23-2022, 01:49 AM   #2
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,117
THOR #7035
Does it have a Battery Control Center or other device that connects the house and chassis batteries together for charging? find what relay or solenoid does the actual connection and disable it to see if it helps.
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Old 10-23-2022, 02:06 AM   #3
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Brand: Thor Motor Coach
Model: 2012 Serrano
State: Washington
Posts: 7
THOR #10232
Yes it has a BCC. Not sure how to find which relay or solenoid. I'm pretty ignorant on electrical but will see what I can figure out. Thanks for the help.
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