Component testing procedure
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENT TESTING PROCEDURE
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Autolamp circuit | 4 and 7 (C205a) | Autolamps | Closed circuit |
| Off | Open circuit | ||
| Parking lamps | |||
| Headlamps | |||
| Parking lights circuit | 5 and 7 (C205a) | Autolamps | Open circuit |
| Off | |||
| Parking lamps | Closed circuit | ||
| Headlamps | Open circuit | ||
| Headlamp circuit | 10 and 7 (C205a) | Autolamps | Open circuit |
| Off | |||
| Parking lamps | |||
| Headlamps | Closed circuit | ||
| Interior lamps circuit | 5 and 4 (C205b) | Interior lamps | Closed circuit |
| Off | Open circuit | ||
| Illumination dimmer resistor | 6 and 4 (C205b) | Rotate knob clockwise | Ohmmeter will show smoothly increasing resistance |