Standard Ignition TCA-74 4WD Switch

Standard Ignition TCA-74 4WD Switch

The Standard Ignition TCA-74 is a direct-fit 4WD switch for restoring four-wheel drive selector operation on select Ford trucks. Built to OE specifications, it uses copper alloy conductors for strong electrical conductivity and low resistive loss.

Compatible with 2005-2010 Ford F-250 Super Duty, Ford F-350 Super Duty, and 2005-2006 Ford F-350 and F-250 applications listed below, this black switch is made with a square female connector and male pin terminals for proper electrical interface.

Key Features

• Direct-fit replacement 4WD selector switch
• OE-spec design for proper fit, form, and function
• Copper alloy conductors for efficient electrical transfer
• Black plastic finish
• 1 square female connector with 4 male pin terminals
• Built with durable materials for service use

Detailed Description

Standard Ignition TCA-74 is engineered as an electrically operated four wheel drive selector switch that replaces a damaged OE unit and restores 4WD function. The switch is designed to match factory specifications, helping maintain correct electrical connection and panel fit in Ford Super Duty and related truck applications. This part number, TCA-74, is a practical OE-style replacement for technicians and owners addressing a failed 4WD selector switch.

This part cross-references 1S8975 and 5C3Z14B166AA for the same application.

What It Helps Fix

• Inoperative four-wheel drive selector switch
• Intermittent or failed 4WD engagement command
• Damaged or worn factory switch contacts
• Poor electrical continuity at the selector switch
• Broken or degraded OE switch housing

Installation Notes and Tips

Verify connector style, terminal count, and vehicle application before installation. This TCA-74 switch uses a female square connector with four male pin terminals, so matching the original electrical interface is important for proper operation. Confirm the vehicle build date on 2010 Ford F-250 Super Duty and 2010 Ford F-350 Super Duty models listed as “to 2/12/10.”

Compatible With: Fits 2005 Ford F-250, N/A; Fits 2005-2006 Ford F-250 Super Duty, N/A; Fits 2005-2006 Ford F-350, N/A; Fits 2005-2006 Ford F-350 Super Duty, N/A; Fits 2008-2009 Ford F-250 Super Duty, N/A; Fits 2008-2009 Ford F-350 Super Duty, N/A; Fits 2010 Ford F-250 Super Duty, N/A, to 2/12/10; Fits 2010 Ford F-350 Super Duty, N/A, to 2/12/10.

Quality Assurance

Standard Ignition builds this switch to OE specification using robust materials and copper alloy conductors to support reliable electrical performance in service applications.