No power off battery?

[Russell McCoy]

17ft Clipper 2014
Left Jeep and trailer together when i got home both battiers dead. Now no power off service battery inside? If i plug trailer into vehicle everything works fine. No blowen fuses did notice some of the red lights next to fuzes did not come on when i pulled them out to check them. Anyone run into this before or any suggestions.

Thanks

[Flybob]

What did you leave on ( 12V) in the trailer? If the trailer battery is dead and you plug it into shore power, the fuses in the converter ( Reverse polarity fuse 30-40A) will blow as the initial current into a dead battery can exceed the fuse rating. I suggest charging the trailer battery with an external automotive type charger before plugging into shore power. You may also want to add an ignition activated relay to the 12V aux line in the Jeep so that the aux line is only powered when the Jeep is running.

[timfromma]

Over discharging a deep cycle battery can damage it.