Dometic Fridge not working on battery

You might want to check the 12 volt leads (both + and -) in the back of the fridge making sure they are connected with good contact.  This would be simple to do and with your milti meter check and find out if there is power to the fridge.  This area is accessible through the lower black louvered cover on the outside of the trailer.  Hope this helps.  

I have a clamp multimeter, I'll do an ohms check and also check the dc amps the clamp.  I do know it's not the fuse itself.  I removed an exact 15 amp fuse from a circuit right above that is working and inserted it and it didn't work either.  I then tried the fuse removed from the fridge circuit and it worked above on another 12V circuit.  I'll check the connection on the back of the circuit as Stephen said.  I took it apart yesterday and realized that you can't just change that one circuit board, it's attached and wired as one big piece of equipment.  It looks like a pretty extensive job to swap out the whole thing.  Everything else works off of 12 volt power, it's only the Fridge that doesn't.  I don't want to screw around with it too much and screw everything else up so I may just live with it running off shore power or propane for now.  I have a local RV shop down the street that is pretty reasonable, I may also have them poke around at it.

If you swapped fuses and still nothing either its not the fuse or you have a short that's blowing the fuses.

Thanks for the pointers guys. The fridge works on 120vac shore power and off of propane. I tried off grids pointer of plugging into shore power but I am still getting an error message when I switch to battery mode. Battery is fully charged, I even checked with electric meter and it’s also showing full power inside (on the inside mounted electronic gauge) when I am disconnected from shore power. Is there a separate element for Running off propane and the 12 volt battery?

Maybe I missed something, how would it work on 120 if he never plugged into shore power?