08 F-450 popping fuse??

[EDAZS]

When I have the Toy hauler hooked up to the truck and the truck is running everything is fine and the truck is charging the batteries. If I push the slide button or run the jacks, this pops the 30 amp charging fuse. My other Fords did not do this. Is this only on 08's or is there something wrong with mine. Took it to Tork Lift and everything checks out ok on the truck as far as no shorts. Under load it seems to pop.

[Scottb NY]

it sounds like the batteries in the trailer are not strong enough to support the load and you are trying to pull too much through the trailer connector. I would load test the trailer batteries and make sure the connections are all good there.

[EDAZS]

Ok I am going to put it to the test. I just installed four 6 volt batteries. I had a new camper for a couple of months with four 6 volts and it popped the fuse with that setup also.