Molex Automotive Crimp Terminals – OEM 66601-1 / 66602-1 | Male & Female

The OEM 66601-1 / 66602-1 are Molex automotive crimp terminals used in Molex connector housing systems. 66601-1 is the female (socket) contact and 66602-1 is the male (pin) contact. These terminals are used in Molex’s standard automotive connector families for sensor signal, actuator control, and body electrical circuits across GM, Ford, Chrysler, and other major automakers that source Molex connector systems.

Key Specifications

• OEM Part Numbers: 66601-1 (Female / Socket) / 66602-1 (Male / Pin)
• Manufacturer: Molex (one of the world’s largest connector manufacturers)
• Gender options: Female (socket) / Male (pin)
• Application: Molex automotive connector housing harness repair and re-pinning

Molex – The OEM Behind North American Automotive Connectors

Molex is one of the world’s largest connector manufacturers, with a particularly strong presence in North American automotive harness systems. Molex supplies OEM connector systems to GM, Ford, Chrysler/Stellantis, and major Asian automakers. The 66601-1 / 66602-1 terminal family is part of Molex’s standard automotive contact series, used in engine management, body electrical, and chassis harnesses across multiple vehicle platforms.

Terminal Identification

• 66601-1 (Female / Socket): The socket contact — receives the male pin. Installed in the female connector housing.
• 66602-1 (Male / Pin): The pin contact — inserts into the female socket. Installed in the male connector housing.

Common Applications

• GM engine management harness re-pinning (ECM, TCM, sensor connectors)
• Ford body electrical harness terminal replacement
• Chrysler/Stellantis powertrain harness repair
• Any Molex connector housing requiring 66601-1 / 66602-1 contacts
• Aftermarket harness assembly using Molex connector housings

Crimping Requirements

• Use a ratchet crimp tool with the correct die set for Molex 66601-1 / 66602-1 terminals
• Strip wire insulation to the length specified in the Molex crimp specification sheet
• Crimp both the wire crimp zone (conductor) and insulation crimp zone (jacket)
• Pull-test each terminal after crimping to verify retention
• Insert terminal into housing until the locking tab clicks

Frequently Asked Questions

Q: What connector housings are compatible with 66601-1 / 66602-1?
A: These terminals are compatible with Molex connector housings that specify 66601-1 (female) or 66602-1 (male) contacts. Cross-reference your connector housing’s terminal acceptance specification to confirm compatibility before ordering.

Q: What wire gauge do these terminals accept?
A: Refer to the Molex crimp specification sheet for 66601-1 / 66602-1 for the exact wire gauge range. Contact Molex’s online product catalog (molex.com) for the full crimp specification.