Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2009MOUNTAINEER 4.6 8, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 3 (COMPONENT TESTING)COMPONENT TESTINGMULTIFUNCTION SWITCHCOMPONENT TESTING PROCEDURE
2009 Mercury Mountaineer 4.6 8, RWD
Component testing procedure
2009 Mercury Mountaineer 4.6 8, RWDSECTION 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 |
|---|---|---|---|
| Washer switch circuit | 2 and 5 | Washer switch depressed | Closed circuit |
| Wiper switch circuit | 6 and 5 | Off | Open circuit |
| High | Closed circuit | ||
| Low | Closed circuit | ||
| 1 and 5 | Off | Closed circuit | |
| High | Closed circuit | ||
| Law | Open circuit | ||
| 4 and 5 | Off | Open circuit | |
| High | Closed circuit | ||
| Low | Closed circuit | ||
| Intermittent wiper circuit | 6 and 5 | Interval 1 | Open circuit |
| Interval 2 | Open circuit | ||
| Interval 3 | Open circuit | ||
| Interval 4 | Closed circuit | ||
| Interval 5 | Closed circuit | ||
| 3 and 5 | Interval 1 | Open circuit | |
| Interval 2 | Closed circuit | ||
| Interval 3 | Closed circuit | ||
| Interval 4 | Closed circuit | ||
| Interval 5 | Open circuit | ||
| 4 and 5 | Interval 1 | Closed circuit | |
| Interval 2 | Closed circuit | ||
| Interval 3 | Open circuit | ||
| Interval 4 | Open circuit | ||
| Interval 5 | Open circuit |
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 |
|---|---|---|---|
| High beam | 9 and 10 | High beam | Closed circuit |
| Flash-to-pass | Open circuit | ||
| Low beam | Open circuit | ||
| Low beam/Flash-to-pass | 11 and 10 | High beam | Open circuit |
| Flash-to-pass | Closed circuit | ||
| Low beam | Open circuit |
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 |
|---|---|---|---|
| Tun signal | 1 and 2 (C202a) | Left turn, Hazard off | Closed circuit |
| 1 (C202a) and 2 (C202c) | |||
| 4 and 5 (C202a) | |||
| 4 (C202a) and 2 (C202c) | Right turn, Hazard off | Closed circuit | |
| 1 and 5 (C202a) | |||
| 1 and 3 (C202a) | |||
| Stoplamps | 9 and 10 (C202a) | Turn signal switch in neutral, Hazard off | Closed circuit |
| 4 (C202a) and 2 (C202c) | |||
| 4 and 5 (C202a) | |||
| Hazard | 6 and 10 (C202a) | Hazard on, Turn signal switch in neutral | Closed circuit |
| 1 and 2 (C202a) | |||
| 1 (C202a) and 2 (C202c) | |||
| 1 and 5 (C202a) | |||
| 1 and 3 (C202a) | |||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.