On your year model Tiffin, Tiffin used a separate 12 volt solenoid activated by the ignition side of the key switch to supply power to those components. When you push the Aux Start, you bypass that solenoid wire. There are 2 activation wires to that solenoid. The power from the AUX switch and the Power from the Ignition side of the switch. So, you have a blown fuse for that Ignition side wire going to that solenoid. You need to check all the fuses(Chassis) at the various chassis fuse blocks. It will NOT be labeled as such. You will have to test EACH chassis fuse until you find the Bad/blown fuse. Doug
