Test I: One or More Stoplamps Are Inoperative

PINPOINT TEST I: ONE OR MORE STOPLAMPS ARE INOPERATIVE

I1-I2:

I2-I4:

I5-I7:

I7-I8:

Normal Operation - All Vehicles
When the brake pedal is applied, the stoplamp switch routes voltage to the smart junction box (SJB). The voltage is then routed out of the SJB to the high mounted stoplamp through circuit CCB08 (VT/WH). Ground for the high mounted stoplamp and the LH rear stoplamp is provided through circuit GD149 (BK/GY). Ground for the RH rear stoplamps is provided through circuit GD151 (BK/GN).

Normal Operation - Explorer
When the SJB detects the brake pedal applied, the SJB provides voltage to the LH and RH rear stoplamps through circuit CLS18 (GY/BN) and circuit CLS19 (VT/OG), respectively.

Normal Operation - Mountaineer
When the SJB detects the brake pedal applied, the SJB provides voltage to the LH and RH rear stoplamps through circuit CLS44 (VT/BN).

Possible Causes
- Circuit CCB08 (VT/WH) open
- Circuit CLS18 (GY/BN) open or short to ground
- Circuit CLS19 (VT/OG) open or short to ground
- Circuit CLS44 (VT/BN) open or short to ground
- Circuit GD149 (BK/GY) open
- Circuit GD151 (BK/GN) open
- High mounted stoplamp
- Light emitting diode (LED) module
- SJB