Interior lighs & pump do not work on battery

[48Jim]

I have a new Cougar 323MKS. When disconnected from 120v, the interior lights, pump tank gauges and panel back light do not work but the slides and the front jacks do work. I connected my battery charger to the battery and it indicates 100% charge. I checked all fuses and breakers in the inverter panel and all are OK. Any ideas why this is happening? (Everything works when plugged into shore power.)

[f6bits]

Slides and jack are probably direct connections to the battery. The other stuff routes through the converter panel. Does the stereo and fridge have the same problem?

If I were going to guess, I’d say one or both of the battery polarity fuses is blown. I know you said you checked all that, but I bet the problem is in the panel.

[SteveC7010]

There are several inline fuses in the front basement where the landing gear motor is located. Before you do anything else, check all of them for a blown fuse.

[66ken]

If yours is like mine the converter is mounted behind the fuse panel. If I remember correctly there are 2 fuses that plug into the converter. (Hope your ribs are feeling better.)

[48Jim]

Thanks to everyone for your input. I feel really foolish. After contacting the dealer and checking everything everyone suggested, I started wondering if the battery could be disconnected. Sure enough, I found the battery disconnect switch in the compartment where the water hookups are. It was in the off position and must have been that way since I left the dealer. I turned it on and everything works. Funny the dealer didn't think to ask about it and odd that the delivery tech would tun it off the day I picked up the camper

[f6bits]

Ah, yes. Not so foolish. Others have discovered that the battery cutoff is *after* some devices like slides and landing gear. That came as a surprise to many of us, including me.

[SAABDOCTOR]

don't feel foolish i have turned mine off and every thing still works. go figure. so i never use it. and to get at it is a pita!

[f6bits]

Now I’m curious. Does the Cougar’s breakaway switch for the brakes still work with the battery disconnect set to off? I installed my own battery disconnect, and it’s the *first* thing in the circuit.

[SteveC7010]

Originally Posted by sdayman

Now I’m curious. Does the Cougar’s breakaway switch for the brakes still work with the battery disconnect set to off? I installed my own battery disconnect, and it’s the *first* thing in the circuit.

If you did not move the hot wire for the breakaway to the battery, it's probably unlikely that it would work if the batteries are off.

I did much the same thing so I have to make double, double sure that at least one of the batteries is on when ever I tow the trailer.