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Reading lamp (225), CV: Connection

The lamps are grounded from REC. Power is supplied to the lamps from a relay controlled by the BCM. The supply voltage lead passes through BCM and REC on its way out to the lamps. The BCM senses the supply to determine whether the relay is activated.

Fig 1: Identifying Relays
G03718089Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fig 2: Circuit Diagram Reading Lamp
G03718090Courtesy of SAAB-SCANIA OF AMERICA, INC.
CONNECTOR PINOUTS REFERENCE

Pin No. Signal type Description
685F pin 5 Ground Ground in grounding point G33P.
685F pin 15 Power supply From BCM pin A19 (K78)
685F pin 16 Power supply From the instrument panel electrical center (22) via fuse F20