Check the fuses on the solenoid itself. If your having problems with your aux battery switch not getting power check this out before going to a shop.
Camper Battery Disconnect Switch
Rv battery disconnect switch not working. The intellitec battery disconnect relay is at the heart of the battery drain protection system. The battery disconnect switch only needs to be turned off when you store or winterize your rv. A simple onoff battery switch takes the hassle out of disconnecting the wiring to the battery in your camper. With a touch of a remote switch the batteries will be completely disconnected preventing. However if you turn the battery disconnect switch off when youre plugged. Once plugged in the power converter or invertercharger provides power even when the disconnect is thrown.
Even if you may not have a switch on your camper randy mentions that they are easily. This may be a loose wire. Some rv manufacturers connect the lp leak detector directly to the battery bypassing the disconnect so you may still have a draw even with the switch on storage. Rv auxiliary battery switch not getting power. This system provides a simple and safe means of remotely disconnecting the batteries of an rv or boat. Two on each one as a rule.
To find out if this is the case with your rig get a 12 volt test light push the switch to storage then disconnect the negative terminal on one of the batteries. Sounds like battery disconnect relay not switching. So suppose you are plugged into shore power and your refrigerator is set on the auto function which means it would normally switch over to propane if the rv was unplugged from shore power. See if there is power or not to the switch and then at the solenoid. Rv battery disconnect switch not working. While the batteries will still discharge over several weeks turning the switch off mans the batteries will discharge more slowly.
Brown 5 amp blade fuses. Once you find out if the problem is in the switch or not then we can check the solenoid itself.