Normal Operation

The smart junction box (SJB) sends a pulse-width modulated (PWM) voltage to the dimmable components through circuit VLN04. Ground is provided through circuits GD111 (BK/BU), GD133 (BK), and GD147 (BK/VT).

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Adjustable pedal switch (if equipped)
• Auxiliary climate control switches (if equipped)
• Clock (if equipped)
• Decklid release switch (if equipped)
• Floor shifter
• Hazard/parking aid/roll stability control/power liftgate switch
• Headlamp switch
• Rear heated seat switches (if equipped)