Community Forums

scorpodoc · 07-10-2022, 10:10 AM

So.. 3 weeks ago attempted to leave for vacation from storage facility and found batteries totally discharged.. 20 amp service to maintain battery charge was off..
ongoing battle with funky GFI.. after getting batteries charged up again the engine, genny, awning and steps worked fine.. but no interior lights..
Checked all fuses I could find, breakers turned on/off, disconnect switches on/off, checked GFI and all okay.. coach batteries 6.7, 6.8 V on all six.. I checked for anything loose in battery bay and nothing out of ordinary.. BUT STILL NO LIGHTS.

Time for the experts so thanking you in advance

09’ Alpine 36 MDDS 425 Cummins 8.9 ISL, toad Honda CRV 14’

TacomaJoe · 07-10-2022, 12:46 PM

Since your other 12V stuff is working, I'd say the batteries are charged and connected. Sounds like just the one circuit is out, you checked the fuse OK, that leaves the switch and wires. With the fuse OK, I'm thinking that you have the +12V getting out but may have a problem with the negative side of things (bad ground connection).

bcbowers · 07-11-2022, 08:13 AM

Everything you’ve identified as working is chassis powered. The cut-off switch by the steps controls all interior 12V power. Make sure it’s on. Beyond that you’ll need to use a voltmeter to check voltages from the switch to the fuse panel in the bathroom.

paul65k · 07-11-2022, 09:09 AM

SO one last thing to check..... I've had fuses that "Look" just fine but don't pass a continuity test. The easiest thing to do is to simply swap the fuse with another that is working fine....it could be as simple as a bad (but looks good) fuse

Cinequip · 07-11-2022, 11:30 PM

On a 2009, both house and chassis main disconnect switches are in the battery compartment. It sounds like the house switch is turned off, or the house fuse is blown. The House Fuse is a MEGA 250A - it's right below the Inverter fuse.

The individual lighting fuses are on the fuse block either in the hallway or inside the bathroom - depending on model. If you have a meter, I suggest testing the thick red feed cable to that block for 12vdc. If no power, then suspect the house fuse as stated above.