Tiffins supply power from the Ford Fuse block to that solenoid. What I do is, test ALL fuses in the fuse block under the dash by the firewall. You will find a fuse blown. It will NOT be over 20 amp. There is no schematic for which fuse. So, I just test ALL fuses until I find one blown. Also, It can drive you crazy IF someone REMOVED that fuse from the Ford Fuse block and there is NO FUSE to test. When I suspect this, I install a ATC 15 amp CB in any open fuse slots in the fuse block to see if power is restored. Also, the fuse that feeds that solenoid will only be active when key is ON. So, make sure your fuse test is done with Key ON. Doug
