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Home >> Volvo >> 2004 >> V70 R, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Bulbs, Control Modules, Charging - Design And Function >> Rear Electronic Module (Rem) (2001-2004) >> Design >> Back-up lamp
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Back-up lamp

Fig 1: Identifying Rear Fog Lamp And Back-Up Lamp
GLL105966Courtesy 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.

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