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.
2004 Ford Mustang Mach 1, StandardFACTORY OEM SERVICE PROCEDURE
Power Windows DTCS
POWER WINDOWS GENERIC ELECTRONIC MODULE (GEM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1405 | Power Window Driver Down Circuit Short to Battery | GEM | Go To PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER, CONVERTIBLE for convertible, or Go To PINPOINT TEST E: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER, COUPE for coupe. |
| B1408 | Power Window Driver Up Circuit Short to Battery | GEM | Go To PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER, CONVERTIBLE for convertible, or Go To PINPOINT TEST E: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER, COUPE for coupe. |
| B1410 | Power Window Driver Motor Circuit Failure | GEM | Go To PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER, CONVERTIBLE for convertible, or Go To PINPOINT TEST E: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER, COUPE for coupe. |
| B1426 | Lamp Safety Belt Circuit Short to Battery | GEM | REFER to HORN . |
| B1428 | Lamp Safety Belt Circuit Failure | GEM | REFER to HORN . |
| C1189 | Brake Fluid Level Sensor Input Circuit Short to Ground | GEM | REFER to HORN . |
| C1223 | Lamp Brake Warning Output Circuit Failure | GEM | REFER to HORN . |
| C1225 | Lamp Brake Warning Output Circuit Short to Battery | GEM | REFER to HORN . |
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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