Standard Ignition Clutch Starter Safety Switch P/N:NS-633
Keep the engine from cranking unless the clutch pedal is pressed with the Standard Ignition Clutch Starter Safety Switch NS-63. It installs as a direct-fit replacement for the 1986-2004 Ford Mustang — see the Buyer's Guide tab for the specific engine applications. This switch senses clutch pedal position and completes the starter circuit only when the pedal is fully depressed, an interlock in the manual-transmission starting system.
Signs this switch may need replacing include a starter that won't crank with the clutch pedal down, or an engine that cranks without the pedal pressed. Because these symptoms can have other causes, diagnose the circuit before replacing. If a failed clutch starter safety switch is the cause, this NS-63 replaces it.
Interchange: S9260 · F469 · NS6429 · E6ZZ11A152A · F4ZZ11A152A · SW2063 · SW2497
This part cross-references / interchanges with the following part numbers:
What does the NS-63 clutch starter safety switch do?
It senses clutch pedal position and completes the starter circuit only when the pedal is fully depressed, acting as a starting interlock on manual-transmission vehicles.
Which vehicles does this switch fit?
It is a direct-fit replacement for the 1986-2004 Ford Mustang. Check the Buyer's Guide tab for the specific engine applications covered.
What are the signs this switch may need replacing?
Common signs include the starter not cranking with the clutch pedal pressed, or the engine cranking without the pedal depressed. Diagnose the circuit first, since other causes are possible.
What numbers does the NS-63 interchange with?
It cross-references S9260, F469, NS6429, E6ZZ11A152A, F4ZZ11A152A, SW2063, and SW2497.
How is the switch built?
It uses copper alloy conductors for strong conductivity with low resistive losses, and every unit is 100% tested for mechanical and electrical switching performance.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.