Normal Operation
WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
When the smart junction box (SJB) detects a request for the LH or RH turn signal, the SJB provides voltage, through the bussed electrical center (BEC), to the front turn lamps through circuit 1342 (GY/BK) (LH front turn lamp) or circuit 1341 (DB/OG) (RH front turn lamp). The turn lamps are grounded through circuit 1205 (BK) through the BEC.
The rear lamps are combination stop/turn lamps. The function of the rear turn lamps uses the stoplamp circuitry.
| DTC Description | Fault Trigger Conditions |
|---|---|
| B1499 - Lamp Turn Signal Left Circuit Failure | A continuous and on-demand DTC that sets when the SJB detects an open or short to voltage from the LH front turn signal voltage supply circuit. |
| B1502 - Lamp Turn Signal Left Circuit Short to Ground | A continuous and on-demand DTC that sets when the SJB detects a short to ground from the LH front turn signal voltage supply circuit. |
| B1503 - Lamp Turn Signal Right Circuit Failure | A continuous and on-demand DTC that sets when the SJB detects an open or short to voltage from the RH front turn signal voltage supply circuit. |
| B1506 - Lamp Turn Signal Right Circuit Short to Ground | A continuous and on-demand DTC that sets when the SJB detects a short to ground from the RH front turn signal voltage supply circuit. |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Bulb holder
- BEC
- SJB