Power only on shore power

Hey everyone,

We went camping last week (connected to shore power) towed the camper home and when I tried run the run the electric hitch, I discovered it would only run when connected to the electric at the house. The lights, awning and slide would also only work when connected to shore power.

Any ideas why this isn't running anything on the batteries ( I have two with a A/B marine switch and both batteries are on and fully charged.

I'm actually out of town until Friday, so if anyone replys with a potential solution, I won't be able to look at the camper until the weekend.

Any ideas?

Thanks

Deano