Test F

PINPOINT TEST F: THE MAP LAMPS ARE INOPERATIVE

Test F1:

Test F1-F2:

Normal Operation
Power to the dome/map lamps is provided through SSP relay 4, circuit 30S-DB16 (RD/GN) and battery junction box (BJB) fuse 4 (10A). Power is supplied to the dome/map lamps on circuit 29-LB22 (OG/GN) which is spliced into circuit 29S-LB19 (OG/BU) which is spliced into circuit 29-LB1 from the BJB. Ground circuit for the map lamps is supplied through circuit 31-LB19 (BK/BU) to the LH cowl ground. The lamp and switch can only be replaced as an assembly.

Possible Causes
- circuit 31-LB19 (BK/BU)
- circuit 29-LB22 (OG/GN)
- dome/map lamp switches