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 MANUALSFORD2010FOCUS S, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 316 (COMPONENT TESTING)COMPONENT TESTINGIGNITION SWITCHCOMPONENT TESTING PROCEDURE
2010 Ford Focus S, Standard
Component Testing Procedure
2010 Ford Focus S, StandardSECTION Component Testing Procedure
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
IGNITION SWITCH COMPONENT TESTING
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Starter relay circuit | 4 and 7 | Off | Open circuit |
| Acc | Open circuit | ||
| Run | Open circuit | ||
| Start | Closed circuit | ||
| Run/Start power circuit | 4 and 1 | Off | Open circuit |
| Acc | Open circuit | ||
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Run/Acc power circuit | 4 and 6 | Off | Open circuit |
| Acc | Closed circuit | ||
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Key reminder circuit | 4 and 5 | Key In | Closed circuit |
| Key Out | Open circuit | ||
| Key removal inhibit circuit | 4 and 3 |  | 65-75 Ω |
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.