Test M: The Stoplamps Are Inoperative

PINPOINT TEST M: THE STOPLAMPS ARE INOPERATIVE

M1-M2:

M2-M4:

M5-M7:

M7-M9:

Normal Operation - Vehicles Without Interactive Vehicle Dynamics (IVD)
The stoplamp ground circuits are independently controlled by the rear electronic module (REM). The brake pedal position switch (BPP) is supplied battery voltage through circuit 29-CF58 (OG/GN). When the brake pedal is pressed, the BPP switch allows voltage to flow through to circuit 29S-CF1 (OG/YE). Circuit 29S-CF1 (OG/YE) is spliced to carry the voltage to the anti-lock brake system (ABS) module, the powertrain control module (PCM) and the rear electronic module (REM). Voltage to the REM (from the BPP switch) after the splice is carried through circuit 29S-DK30 (OG). When the REM receives voltage from the BPP switch, the REM illuminates the stoplamps.

Normal Operation - Vehicles With IVD
The stoplamp ground circuits are independently controlled by the rear electronic module (REM). The brake pedal position switch (BPP) is supplied battery voltage through circuit 29-CF58 (OG/GN). When the brake pedal is pressed, the BPP switch allows voltage to flow through circuit 29S-CF1 (OG/YE) to the IVD module. The IVD module then sends voltage through circuit 29S-CF2 (OG/BU), which is spliced to carry the voltage to the powertrain control module (PCM) and the rear electronic module (REM). Voltage to the REM (from the IVD module) after the splice is carried through circuit 29S-DK30 (OG). When the REM receives voltage from the IVD module, the REM illuminates the stoplamps.

Possible Causes
- Circuit 29-CF58 (OG/GN) open
- Circuit 29S-CF1 (OG/YE) open
- Circuit 29S-CF2 (OG/BU) open or shorted to ground
- Circuit 29S-DK30 (OG) open or shorted to ground
- BPP switch
- REM
- IVD module