If you’re restoring or repairing your 66 Mustang, one component that you shouldn’t overlook is the neutral safety switch. This switch, which is located on the transmission shifter or linkage, prevents the engine from starting unless the transmission is in neutral or park. In this article, we’ll discuss the wiring diagram for the 66 Mustang neutral safety switch, along with some frequently asked questions about this important component.
The Basics of the 66 Mustang Neutral Safety Switch
The neutral safety switch on a 66 Mustang is an integral part of the starting system, as it ensures that the engine only starts when the transmission is in the proper position. This switch is typically located on the automatic transmission shifter or linkage, and is connected to the starter solenoid via a series of wires. When the transmission is in park or neutral, the switch completes a circuit that allows the starter to engage. If the transmission is in any other gear, the circuit is broken and the starter will not engage.
It’s important to note that a faulty or damaged neutral safety switch can cause a variety of issues, including difficulty starting the engine, stalling at idle, or even engine damage due to starting in gear. Therefore, it’s crucial to ensure that the switch is functioning properly before attempting to start the vehicle.
The Wiring Diagram for the 66 Mustang Neutral Safety Switch
The wiring diagram for the 66 Mustang neutral safety switch is relatively straightforward, but should be followed carefully to ensure proper function. The switch itself typically has four terminals, which connect to the starter solenoid and ignition switch.
The wiring diagram for the 66 Mustang neutral safety switch is as follows:
| Terminal | Wire Color | Connection |
|---|---|---|
| 1 | Red/Blue | To ignition switch |
| 2 | Yellow/Black | To starter solenoid |
| 3 | Pink | To starter solenoid |
| 4 | Green | Ground |
It’s important to note that the wire colors may vary depending on the specific year and model of the Mustang, so it’s always a good idea to consult the factory service manual for your vehicle before attempting any wiring work.
FAQ
Q: What happens if the neutral safety switch fails?
A: If the neutral safety switch fails, the engine may not start or may stall when shifted into gear. Additionally, attempting to start the engine in gear can cause damage to the transmission or engine.
Q: How can I test the neutral safety switch?
A: To test the neutral safety switch, simply connect a multimeter to the terminals and check for continuity between the appropriate pairs when the shifter is in neutral or park.
Q: Can I bypass the neutral safety switch?
A: While it’s technically possible to bypass the neutral safety switch, doing so is not recommended as it can result in safety hazards and damage to the vehicle.
Q: What other components should I check when servicing the neutral safety switch?
A: When servicing the neutral safety switch, it’s also a good idea to inspect the shifter linkage and adjust as necessary to ensure proper function.
Q: Do I need to replace the neutral safety switch during routine maintenance?
A: While the neutral safety switch doesn’t typically require replacement during routine maintenance, it’s always a good idea to inspect the switch for damage or wear when servicing the transmission or starting system.
Overall, the neutral safety switch is a crucial component of the starting system on a 66 Mustang, and should not be overlooked during restoration or repair. With the correct wiring diagram and careful testing, you can ensure that your switch is functioning properly and keep your vehicle running smoothly for years to come.
