Normal Operation

When the parking lamps are on, the Smart Junction Box (SJB) provides voltage to the hardwired dimmable illumination sources based on the input received from the instrument panel dimmer switch.

• DTC B29B7 (White Lighting Output Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage from the backlighting output circuit.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• SJB