2002 Pontiac Montana Sliding doors and rear backup alert -

Do the stoplamps work? The IGN 1 fuse in the i/p fuse block controls power to the rear object sensors, and both rear side doors. If the fuse is good, you could have a circuit fault, I would check the pink wire for power at pin G3(I/P side,Key on), of connector C203. I don't show a picture of this connector location, just a description, and the connector end view, here it is; C203 (56 cavities) IP wiring harness to the left side of the body wiring harness, left side of the steering column, below P101

Connector Part Information "¢ 12034257 "¢ 56-Way F Metri-Pack Mixed Series (BLK) Connector Part Information "¢ 12186339 "¢ 56-Way M Metri-Pack Mixed Series (BLK) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function A1 ORN 1052 Auxiliary Blower Motor Supply Voltage A1 ORN 1052 Auxiliary Blower Motor Supply Voltage A2 YEL 18 Left Rear Stop/Turn Lamp Supply Voltage A2 YEL 18 Left Rear Stop/Turn Lamp Supply Voltage A3 DK GRN 19 Right Rear Stop/Turn Lamp Supply Voltage A3 DK GRN 19 Right Rear Stop/Turn Lamp Supply Voltage A4 LT BLU 1134 Park Brake Switch Signal A4 LT BLU 1134 Park Brake Switch Signal LT BLU 1134 Park Brake Switch Signal A6 -- -- Not Used A6 -- -- Not Used A7 GRY 778 Auxiliary Blower Motor Speed Control A7 GRY 778 Auxiliary Blower Motor Speed Control A8 WHT 17 Stop Lamp Switch Signal A8 WHT 17 Stop Lamp Switch Signal A9 BRN 241 Ignition 3 Voltage A9 BRN 241 Ignition 3 Voltage B1 WHT 615 Memory 1 Switch Signal B1 WHT 615 Memory 1 Switch Signal B2 GRY 391 Rear Window Wiper Switch Signal B2 GRY 391 Rear Window Wiper Switch Signal B3 BRN 882 Right Rear Wheel Speed Sensor Signal B3 BRN 882 Right Rear Wheel Speed Sensor Signal B4 WHT 883 Right Rear Wheel Speed Sensor Low Reference B4 WHT 883 Right Rear Wheel Speed Sensor Low Reference B6 BRN 9 Park Lamp Supply Voltage B6 BRN 9 Park Lamp Supply Voltage B7 WHT 393 Rear Window Wiper Motor Control B7 WHT 393 Rear Window Wiper Motor Control B8 DK GRN 392 Rear Window Washer Pump Control B8 DK GRN 392 Rear Window Washer Pump Control B9 -- -- Not Used B9 -- -- Not Used C1 BLK 884 Left Rear Wheel Speed Sensor Signal C1 BLK 884 Left Rear Wheel Speed Sensor Signal C2 RED 885 Left Rear Wheel Speed Sensor Low Reference C2 RED 885 Left Rear Wheel Speed Sensor Low Reference C3 LT BLU 733 Air Temperature Door Position Signal C3 LT BLU 733 Air Temperature Door Position Signal C4 GRY 2700 5 Volt Reference C4 GRY 2700 5 Volt Reference C6 YEL 804 Door Ajar Indicator Control C6 YEL 804 Door Ajar Indicator Control C7 DK BLU 1128 SDM Class 2 Serial Data C7 DK BLU 1128 SDM Class 2 Serial Data C8 PPL 1589 Fuel Level Sensor Signal C8 PPL 1589 Fuel Level Sensor Signal C9 YEL 1127 Class 2 Serial Data C9 YEL 1127 Class 2 Serial Data D1 LT BLU 1072 Auxiliary Blower Motor Medium Speed Control D1 LT BLU 1072 Auxiliary Blower Motor Medium Speed Control D2 BLK/WHT 351 Ground D2 BLK/WHT 351 Ground D3 GRY 8 Instrument Panel Lamp Supply Voltage - 1 D3 GRY 8 Instrument Panel Lamp Supply Voltage - 1 D6 PPL 493 Rear Seat Audio Enable Signal D6 PPL 493 Rear Seat Audio Enable Signal D7 BLK 2759 Low Reference D7 BLK 2759 Low Reference D8 ORN 640 Battery Positive Voltage D8 ORN 640 Battery Positive Voltage E1 DK BLU 46 Right Rear Speaker Output (+) E1 DK BLU 46 Right Rear Speaker Output (+) E2 TAN 201 Left Front Speaker Output (+) E2 TAN 201 Left Front Speaker Output (+) E3 LT GRN 200 Right Front Speaker Output (+) E3 LT GRN 200 Right Front Speaker Output (+) E4 YEL 116 Left Rear Speaker Output (-) E4 YEL 116 Left Rear Speaker Output (-) E6 LT BLU/ BLK 1505 Passenger Heated Seat Switch Signal E6 LT BLU/ BLK 1505 Passenger Heated Seat Switch Signal E7 LT BLU 1462 Heated Seat Switch Signal E7 LT BLU 1462 Heated Seat Switch Signal E8 LT GRN 1011 Remote Radio Control Signal E8 LT GRN 1011 Remote Radio Control Signal E9 DK GRN 890 Fuel Tank Pressure Sensor Signal E9 DK GRN 890 Fuel Tank Pressure Sensor Signal F1 GRY/BLK 308 Step Dim Signal F1 GRY/BLK 308 Step Dim Signal F2 PPL 616 Memory 2 Switch Signal F2 PPL 616 Memory 2 Switch Signal F3 BRN/WHT 1048 Class 2 Serial Data F3 BRN/WHT 1048 Class 2 Serial Data F4 -- -- Not Used F4 -- -- Not Used F6 YEL 1176 Auxiliary Blower Motor Low Speed Control F6 YEL 1176 Auxiliary Blower Motor Low Speed Control F7 LT GRN/ BLK 24 Backup Lamp Supply Voltage F7 LT GRN 24 Backup Lamp Supply Voltage F8 BLK 1550 Ground F8 BLK 1550 Ground F9 PNK 314 Radio On Signal F9 PNK 314 Radio On Signal G1 -- -- Not Used G1 -- -- Not Used G2 BRN 641 Ignition 3 Voltage G2 BRN 641 Ignition 3 Voltage G3 PNK 39 Ignition 1 Voltage G3 PNK 39 Ignition 1 Voltage G4 WHT 1310 EVAP Canister Vent Solenoid Control G4 WHT 1310 EVAP Canister Vent Solenoid Control G5 PNK/BLK 1303 Liftgate Ajar Switch Signal G5 PNK/BLK 1303 Liftgate Ajar Switch Signal G6 -- -- Not Used G6 -- -- Not Used G7 BRN 199 Left Rear Speaker Output (+) G7 BRN 199 Left Rear Speaker Output (+) G8 LT BLU 115 Right Rear Speaker Output (-) G8 LT BLU 115 Right Rear Speaker Output (-) G9 DK GRN 117 Right Front Speaker Output (-) G9 DK GRN 117 Right Front Speaker Output (-) G10 GRY 118 Left Front Speaker Output (-) G10 GRY 118 Left Front Speaker Output (-)