When I used to work on those conversion vans they put the fuse box anywhere,
look on the sides and at the rear of the van for a power box. It wont be a
fuse that is blown, it should be protected by a circuit breaker which should
reset itself.

If you still cant find it, there should be a sticker on the inside door jam
on the drivers side with the conversion company name/phone number

Glenn Beasley
Chrysler Tech