Question: We bought a used 2000 Mitsubishi Montero Sport in the islands, my husband took the battery out this morning to charge it and the horn keeps going off when he wants to reconnet it. We did not know it had A alarm. How do we shut off the alarm we really dont need it? We have no owners manual. Answer: The best way around this issue. Put the key in the ignition and turn it on. Then connect the battery. Then start the vehicle.