Normal Operation
WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition switch is in the RUN position, the headlamps are not on (from the autolamp system or manual control from the headlamp switch), the transaxle is not in PARK (P) (automatic transaxle) or the parking brake is not applied (manual transaxle), the smart junction switch (SJB) provides a pulse-width modulated (PWM) voltage to the low beam headlamps. This illuminates the headlamps at a reduced intensity.
This pinpoint test is intended to diagnose the following:
- Exterior lighting system input/output
- Ignition switch input
- Transaxle gear input (automatic transaxle)
- Parking brake switch input (manual transaxle)
- SJB