2014 winnebago vista battery drain, locked relay under dash

trying to help a guy out, he isnt in great health. i was in the repair business 30 yrs, but no rv experience. he has a 2014 winnie vista. ford owners manual says f series super duty class a commercial. he has a battery drain. i tracked it down to a relay locked on under the dash. additionally, the speedometer needle tries to go below zero, and bounces off rapidly off zero as it tries. i didnt look for the relay yet, i like to know what im looking for first. its fed by 50 amp maxi fuse, says "instrument panel battery feed, fuses 4,10,16,22 ". pulling those 4 min fuses doesnt kill the draw, only pulling the 50 amp maxi fuses does. if i tap the neg cable on the battery terminal, the relay clicks on and off with the tapping. ideally i need a schematic of the 50 amp fused circuit, or advice if anyone has seen this before. i have an e-350 schematic, its different, not usable. thanks