Test I
PINPOINT TEST I: ONE OR MORE STOPLAMPS ARE INOPERATIVETest I1-I2:
Test I3-I5:
Normal Operation
The brake pedal position switch (BPP) is supplied battery voltage through circuit 10 (LG/RD). When the brake pedal is pressed, the BPP switch allows voltage to flow through circuit 511 (LG). Circuit 511 (LG) supplies power directly to the multifunction switch and to circuit 569 (DG) which supplies power to the high mounted stoplamp. The multifunction switch internally splits the power (when in the neutral position) to circuits 374 (DB/WH) (LH stoplamps) and 378 (BN/YE) (RH stoplamps). Circuits 374 (DB/WH) and 378 (BN/YE) supply power to the LH and RH stoplamps accordingly
Possible Causes
- Circuit 511 (LG) open.
- Circuit 569 (DG) open.
- Circuit 374 (DB/WH) open.
- Circuit 378 (BN/YE) open.
- Circuit 1205 (BK) open.
- High mounted stoplamp.
- Multifunction switch.