Just had to fix mine this weekend - talking MY90 here. Look under battery tray (from front bumber) towards the right side under the battery tray up against the inner plastic wing/wheel arch is the connections to the reverse switch - wire into the connector had broken on mine. If connector will not come off easily I'm afraid its a jack up, remove wheel (front passenger)take inner platic wheel arch out and at the top of the gearbox is the two wire lead to the reverse light switch.