hey, this is what u can do, my module went out recently so when i was testing everything, i know the input and output wires, if u know where the module is, u can disconnect (reconnect when done) the harness and what u can do is run a wire from the thick + input (it's 12v all the time) and put it to the brown thick wire to the output.

ofcourse u can put a switch in between to cut it on and off, this wil allow u to turn it on any time u want, or let it just be on auto.