Keep the key-to-starter circuit working as intended with the Standard Ignition Starter Switch US-122. This electrical switch routes battery power to the ignition and accessory circuits and signals the starter when the key is turned. It is a direct-fit replacement for the listed applications, including the 1977 Ford F-100, 1977 Ford F-150, 1977 Ford E-150 Econoline and 1977 Ford Ranchero.
- Controlled manufacturing: Standard is a global maker of original equipment ignition products and maintains quality control throughout the manufacturing process, from individual components to the finished switch.
- Copper alloy conductors: Designed for superior electrical conductivity with low resistive losses.
- Quality materials: Standard builds its ignition switch line from high-grade materials for proper fit and function.
- 100% tested: Every switch is tested to verify both mechanical and electrical switching performance.
Its robust design is built for the demanding needs of today's service professional. Signs this switch may need replacing include no crank when the key is turned, power cutting out, or accessories that won't operate in certain key positions. Diagnose the cause first, because wiring or starter faults can produce similar symptoms.
Fitment: 1977 Ford B-100, 1977 Ford E-100 Econoline, 1977 Ford E-100 Econoline Club Wagon, 1977 Ford E-150 Econoline, 1977 Ford E-150 Econoline Club Wagon, 1977 Ford E-250 Econoline, 1977 Ford E-250 Econoline Club Wagon, 1977 Ford E-350 Econoline, 1977 Ford E-350 Econoline Club Wagon, 1977 Ford F-100, 1977 Ford F-150, 1977 Ford F-250, 1977 Ford F-350, 1977 Ford F-500, 1977 Ford P-500, 1977 Ford Ranchero. See the "Vehicles it fits" section for engine details.
Interchange: 2-IS87
2IS87 · CS134 · IS87 · LS504 · KS6643 · D6TB11572AA · D6TZ11572A · 88921889
This part cross-references / interchanges with the following part numbers:
CS134, IS87, LS504, KS6643, D6TB11572AA, D6TZ11572A, 88921889, 2-IS87
Frequently Asked Questions
What does an ignition starter switch do?
It is the electrical switch the key operates. It routes battery power to the ignition and accessory circuits and sends the crank signal to the starter when turned to the start position.
What are signs the ignition switch may need replacing?
Possible signs include no crank when the key is turned, power cutting out, or accessories that won't run in certain key positions. Diagnose first, because wiring or starter faults can cause similar symptoms.
Which vehicles does the US-122 fit?
It fits 16 listed 1977 Ford applications, including the Ford F-100, Ford F-150, Ford F-250, Ford F-350, Ford E-150 Econoline and Ford Ranchero. The full list is in the fitment section and the "Vehicles it fits" section.
Is this switch tested before it ships?
Yes. Standard states that its ignition switches are 100% tested to verify both mechanical and electrical switching performance.
What are the switch's conductors made of?
Standard uses copper alloy conductors, which are designed for superior electrical conductivity with low resistive losses.
