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| Feature | Specification |
| Primary Part Number | MOTORCRAFT SW1104A |
| OEM Part Number | D2DZ-15520-C (Ford/Motorcraft) |
| Function | Backup Light Switch (Activates reverse lights when transmission is shifted to Reverse) and Neutral Safety Switch (Prevents starting the engine in any gear other than Park or Neutral) |
| Voltage | 12 Volts |
| Transmission Type | Automatic Transmission (A/T) |
| Terminals | Multi-pin connection (Typically 4-7 terminals, depending on combined function) |
| Construction | Plastic/Metal housing with plunger or actuator arm |
| Typical Use | Original Equipment (OE) switch mounted on the side of the automatic transmission or on the steering column selector. |
| Vehicle/Truck | Years | Transmission Type | Notes |
| Ford Maverick | 1972 | Automatic Transmission (A/T) | Confirmed OE fitment for both backup and neutral safety functions. |
| Ford Falcon (North America) | 1972 | Automatic Transmission (A/T) | Confirmed OE fitment. |
| Ford Passenger Cars | 1972 - 1973 | Automatic Transmission (A/T) | Used on various compact and intermediate Ford models (Often superseded by D3DZ-15520-A in 1973). |
| Mercury Comet | 1972 | Automatic Transmission (A/T) | Mercury equivalent to the Maverick. |
