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.
2003 Ford ZX2 StandardFACTORY OEM SERVICE PROCEDURE
Component Testing Procedure
WARNING: This page is about a different car, the 2006 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
MASTER WINDOW ADJUST 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 |
|---|---|---|---|
| Power and Ground Checks Before Any Other Tests | 8 (C504b) and 4 (C504a) 8 (C504b) and 3 (C504a) 8 (C504b) and 2 (C504a) 8 (C504b) and 1 (C504a) 8 (C504b) and 5 (C504b) 8 (C504b) and 8 (C504a) 8 (C504b) and 7 (C504a) 8 (C504b) and 6 (C504a) 8 (C504b) and 5 (C504a) 6 (C504b) and 7 (C504b) |
All Eight Window Switches (at rest) | Open circuit |
| 5 (C504b) and 4 (C504a) 5 (C504b) and 3 (C504a) 5 (C504b) and 2 (C504a) 5 (C504b) and 1 (C504a) 5 (C504b) and 8 (C504a) 5 (C504b) and 7 (C504a) 5 (C504b) and 6 (C504a) 5 (C504b) and 5 (C504a) |
All Eight Window Switches (at rest) | Closed circuit | |
| Left front window circuit | 8 (C504b) and 5 (C504a) | Up | Closed circuit |
| 5 (C504b) and 6 (C504a) | - | ||
| 8 (C504b) and 6 (C504a) | Down | ||
| 5 (C504b) and 5 (C504a) | |||
| Right front window circuit | 8 (C504b) and 7 (C504a) | Up | Closed circuit |
| 5 (C504b) and 8 (C504a) | |||
| 8 (C504b) and 8 (C504a) | Down | ||
| 5 (C504b) and 7 (C504a) | |||
| Left rear window circuit | 8 (C504b) and 2 (C504a) | Up | Closed circuit |
| 5 (C504b) and 1 (C504a) | |||
| 8 (C504b) and 1 (C504a) | Down | ||
| 5 (C504b) and 2 (C504a) | |||
| Right rear window circuit | 8 (C504b) and 3 (C504a) | Up | Closed circuit |
| 5 (C504b) and 4 (C504a) | |||
| 8 (C504b) and 4 (C504a) | Down | ||
| 5 (C504b) and 3 (C504a) |
Factory Service Tools
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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.
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