Standard Ignition Ignition Switch P/N:US-819
Standard Motor Products
Send power where it belongs at every turn of the key with the Standard Ignition switch US-81, an ignition starter switch for classic Ford and Mercury models. It is a direct-fit replacement for many vehicles, among them the 1973 Ford Mustang, 1971-1972 Ford Country Sedan and 1971-1972 Ford Country Squire; see the "Vehicles it fits" section for the full list. When the key is turned, the switch routes power to the ignition and accessory circuits and signals the starter circuit in the START position.
Signs this part may need replacing include no crank when the key is turned to START, intermittent loss of power to the ignition or accessories, or stalling while driving. Because other components can cause these symptoms, diagnose the cause before replacing the switch.
Interchange: CS66 · LS408 · KS6584 · D1AZ11572B
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
What does the Standard Ignition US-81 do?
It is an ignition starter switch. When the key is turned, it routes power to the ignition and accessory circuits and signals the starter circuit in the START position on the listed Ford and Mercury applications.
Is the US-81 the right Mustang switch for a 1973 Ford Mustang?
US-81 is listed for the 1973 Ford Mustang, along with the other Ford and Mercury models in the "Vehicles it fits" section, which also shows engine details.
What signs mean an ignition switch may need replacing?
Common signs include no crank in the START position, intermittent loss of ignition or accessory power, or stalling while driving. Other parts can cause these symptoms, so diagnose the cause before replacing the switch.
How is the US-81 tested?
Standard Ignition states that its switches are 100% tested to verify both mechanical and electrical switching performance.
Which part numbers does the US-81 interchange with?
It interchanges with CS66, LS408, KS6584 and D1AZ11572B.
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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.