Mine, 1999 DEWALD hydraulics., (Conquest LE Class-C, dual slides) failed last month, problem was motor brushes worn out. Found motors online $195 to $1300, but got new, exact same motor (PARKER OILDYNE 108 J1171?) on ebay for $78 as a Mercury Marine trim motor and cured issue. TIP: TO GET BOOKS, get BRAND/ MODEL AND GOOGLE/ BING/ DOGPILE SEARCH for Owner Manual, Parts Manual, Service Manual. Good Luck. On motor power, check for 12vdc breaker RESET near coach battery (within 18"?) Control FUSE maybe inline, on pump itself, tapping battery power there.
2000 Conquest LE 6266, Class-C on 99-E450SD, 6.8, 2v, V-10