Component Testing Procedure
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
MAIN LIGHT SWITCH - COMPONENT TESTING TABLE
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Headlamp circuit | 3 and 7 | Off | Open circuit |
| Park | Open circuit | ||
| Low | Closed circuit | ||
| Auto | Open circuit | ||
| Autolamp circuit | 3 and 4 | Off | Open circuit |
| Park | Open circuit | ||
| Low | Open circuit | ||
| Auto | Closed circuit | ||
| Parking lamps | 2 and 3 | Off | Open circuit |
| Park | Closed circuit | ||
| Low | Open circuit | ||
| Auto | Open circuit | ||
| Fog lamps | 3 and 5 | Off | Open circuit |
| Fog lamps | Closed circuit |