You bring up a good point. Is it homing you want to change or Next Available with doors open and hall lantern lit? My circuit won't do that. Not an easy fix! My circuit will send a car to a floor you select.Open doors then close them, should stay at that floor (available) unless dispatched elsewhere. Once call is registered at floor a 42 relay will then open doors lite hall lantern and ring bell! That's why I would jumper in the circuit..Did I really just Say Jumper!!!!I meant circuit diverter and play with the design. You should be able to interupt the old homing circuit if you have the correct wiring sheets!