Disconnecting Battery

Some Range Rover models are equipped with an anti-theft alarm unit with an internal battery back-up. When ignition is on, the internal battery is charged via an ignition feed. The anti-theft alarm unit will sound for 4.5 minutes if either the unit connector is disconnected or the wires to it are cut. To disconnect main battery, turn ignition on and then off, and disconnect main battery within 17 seconds. Anti-theft alarm will be activated using back-up battery if main battery is not disconnected within 17 seconds. To silence anti-theft alarm if triggered reconnect main battery and turn ignition on. Disconnecting the battery while the alarm system is set will trigger the anti-theft alarm. Always disarm the alarm system before disconnecting the battery. On Range Rover, all handset transmitters must be resynchronized when the vehicle's main battery has been disconnected.

Before disconnecting main battery, obtain radio presets and anti-theft code for radio from vehicle owner. When radio is disconnected from battery power it will not operate when power is restored until anti-theft code is entered. See vehicle OWNER'S MANUAL for procedure. Other vehicle systems (if equipped) affected by disconnecting battery may be electric windows and sun roof, trip computer, trip odometer and remote security handsets. See vehicle OWNER'S MANUAL for system reset procedures before disconnecting battery.