I have searched for the answer to my problem but cannot find it.
Please help

Fitted in the Bongo is a power management system,we were getting very excited at weekend about using the Bongo for it first camping trip,especially as it will be to the Charity Farm Meet.
Trauma,we cannot seem to use the leisure battery,everything works fine on electric hook up,but switch to van and nothing,we checked the battery and it is fully charged,checked fuses in the PMS.
Are there any suggestons where to check for a fuse or how to pursue.
Any help greatly recieved,just want everything perfect for our first meet
Thanks