Test I: All The Stoplamps Are Inoperative

PINPOINT TEST I: ALL THE STOPLAMPS ARE INOPERATIVE

Normal Operation
For all vehicles, the stoplamp switch is supplied voltage through circuit SBP04 (GN/RD) from the smart junction box (SJB). When the brake pedal is applied, the stoplamp switch routes voltage to the SJB through circuit CCB08 (VT/WH).

For Fusion, the SJB provides voltage to the rear stoplamps.

For Milan and MKZ, the voltage is routed through the SJB to all the stoplamps through circuit CLS17 (YE/GY).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Stoplamp switch
- SJB

I1-I2:

I2-I4:

I5-I6: