Sounds like you are not seeing any 12V DC power either. There are two "Reverse Polarity" fuses on my converter for accidentally hooking up the battery cables backwards. Check those.
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Mike, Sue, Sissy and Little Man
2015 Ford F350 Lariat FX4 6.7 CC DRW
2015 Eagle Premier 351RSTS
Check the coach power switch and relay. The toggle switch on the dash. The switch closes a relay right behind the main battery. Take a meter or test light and measure both sides of the relay to ground. If you turn the switch on and do not have battery voltage on both sides of the relay the relay may be bad. Next check for battery voltage coming from the switch. Battery voltage is 12V.
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Bob and Kim
1995 Jayco M-294FL
Sea Ray 187
Mirrocraft
2 Dogs, 2Cats, 4 Kids and 1 Grandaughter:D
1979 Winnebago Brave 28
1976 Jayco Wren PU