Test J: One Or More Stoplamps Are Inoperative

PINPOINT TEST J: ONE OR MORE STOPLAMPS ARE INOPERATIVE

Normal Operation - Fusion
When the brake pedal is applied, the stoplamp switch routes voltage to the smart junction box (SJB). The voltage is then routed through the SJB to the high mounted stoplamp through circuit CLS17 (YE/GY). When the SJB detects the brake pedal applied, the SJB provides voltage to the LH and RH rear stoplamps through circuits CLS18 (GY/BN) and CLS19 (VT/OG), respectively. Ground for the rear stoplamps is provided through circuit GD171 (BK/GY).

Milan, MKZ
When the SJB detects the brake pedal applied, voltage is routed through the SJB to the stoplamps through circuit CLS17 (YE/GY). Ground for the stoplamps is provided through circuit GD171 (BK/GY).

The rear lamps contain electronics that modulate the voltage frequency to the LED bulbs.







This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- High mounted stoplamp
- Rear lamp assembly
- SJB

J1-J2:

J3-J5:

J5-J7:

J7-J8: