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.
Component testing procedure
2005 Ford Taurus SEL, 4D SedanSECTION Component testing procedure
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
IGNITION SWITCH (14489) COMPONENT TESTING
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move key to these positions | A good switch will indicate |
|---|---|---|---|
| Run/Start power circuit | 4 and 1 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Run/Acc power circuit | 4 and 6 | Off/Lock | Open circuit |
| Accessory | Closed circuit | ||
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Key reminder circuit | 4 and 5 | Key In | Closed circuit |
| Key Out | Open circuit | ||
| Start power circuit | 4 and 7 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Open circuit | ||
| Start | Closed circuit |
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.