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.
2012 Ford Fiesta S, Standard TransFACTORY OEM SERVICE PROCEDURE
Component testing procedure
COMPONENT TESTING PROCEDURE CHART
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Power Checks before any other tests | 2 (504C) and 7 (C504C) | at rest | Open circuit |
| 2 (504C) and 8 (C504C) | at rest | Open circuit | |
| 2 (504C) and 6 (C504C) | at rest | Open circuit | |
| 2 (504C) and 5 (C504C) | at rest | Open circuit | |
| 2 (504C) and 4 (C504A) | at rest | Open circuit | |
| 2 (504C) and 1 (C504A) | at rest | Open circuit | |
| 2 (504C) and 1 (C504C) | at rest | Closed circuit | |
| Ground checks before any other tests | 4 (504C) and 7 (C504C) | at rest | Closed circuit |
| 4 (504C) and 8 (C504C) | at rest | Closed circuit | |
| 4 (504C) and 6 (C504C) | at rest | Closed circuit | |
| 4 (504C) and 5 (C504C) | at rest | Closed circuit | |
| 4 (504C) and 1 (C504C) | at rest | Open circuit | |
| 2 (504A) and 4 (C504A) | at rest | Closed circuit | |
| 2 (504A) and 1 (C504A) | at rest | Closed circuit | |
| Left front window circuit | 7 (504A) and 3 (C504A) | Up | Closed circuit |
| 7 (504A) and 5 (C504A) | Down | Closed circuit | |
| Right front window circuit | 7 (504A) and 1 (C504A) | Down | Closed circuit |
| 7 (504A) and 4 (C504A) | Up | ||
| Left rear window circuit | 2 (504C) and 8 (C504C) | Down | Closed circuit |
| 2 (504C) and 7 (C504C) | Up | ||
| Right rear window circuit | 2 (504C) and 5 (C504C) | Down | Closed circuit |
| 2 (504C) and 6 (C504C) | Up |
Factory Service Tools
Use the Manual With the Right Hardware
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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.