Originally Posted by clyon51
The solenoid will have 2 large posts, 1 for chassis batt and 1 for the coach. If the solenoid has 2 small control posts, 1 will come from the alternator circuit and another from the manual AUX Boost switch on the dash.
Not true. If the solenoid has two small posts, then one must be grounded and the other one has to recieve 12v to activate the solenoid. You could put diodes on the end of the alternator and aux/start wires and feed them to the same small terminal.