Back-up lamp

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Volvo V70, 2006 Volvo V70, 2005 Volvo V70, 2004 Volvo V70, and 2003 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Rear Fog Lamp And Back-Up Lamp

Courtesy of VOLVO CARS OF NORTH AMERICA.

There are two back-up (reversing) lamps. These are in the tail lamps. The back-up (reversing) lamp lights when back-up (reverse) gear is selected. The back-up (reversing) lamps are connected to the rear electronic module (REM) via a directly connected relay. The lamps are powered via the relay.

Cars with manual transmissions

Cars with manual transmissions have a back-up (reverse) switch on the transmission. The switch closes and transmits a directly connected signal to the central electronic module (CEM) when back-up (reverse) gear is selected.

There are diagnostics for the back-up (reversing) lamp relay.

Cars with automatic transmissions

In cars with automatic transmissions, a signal is transmitted from the transmission control module (TCM) on the Control area network (CAN) to the central electronic module (CEM) indicating that back-up (reverse) gear is selected.

There are diagnostics for the back-up (reversing) lamp relay.