Sorry your first post is about problems .
Do you have info on the leveling jacks brand and series ?
Most have a manual retract method .
Are all the non function circuits Forest River installed ?
Are all Forest River installed circuits dead , or just the four fuses?
Are the dead fuses powered from the coach battery bank ?
Within 3' of the battery positive post there should be a master fuse or 12 volt circuit breaker , so follow the cable and look for a fuse or breaker that looks like one of these two .