Component testing procedure
WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. 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 |
|---|---|---|---|
| Interior lamps Circuit | 4 and 2 | Interior lamps | Closed circuit |
| Off | Open circuit | ||
| Illumination dimmer resistor | 4 and 1 | Rotate knob clockwise | Ohmmeter will show smoothly increasing resistance |