A system and method for controlling a transmission of electrical signals (11) by a proximity remote (10) to a receiver (22) for regulating a remote access to premises of a vehicle. The proximity remote (10) is configured to be powered by a battery (19) mounted therein on first and second battery base contacts (24, 25). The system includes: a internal control device (20) insertable within the proximity remote (10) and connectable to the first and second battery base contacts (24, 25); first and second conductors (27) connectable to the control device (20) at respective first and second contacts thereof for controlling a power supplied to the proximity remote (10); and a power supply control device (28) connectable to the first and second connectors (27) for controlling the power supplied to the proximity remote (10), thereby respectively permitting and inhibiting the transmission.