Standard Ignition TCA-4 4WD Indicator Light Switch

4WD Indicator Light Switch for Manual Shift Transfer Cases

The Standard Ignition TCA-4 is a 4WD indicator light switch built for vehicles with a manual shift transfer case. It uses a 3-terminal blade design with a female connector and male terminals, and it is built with copper alloy conductors for strong electrical conductivity and low resistance.

• 4WD indicator light switch for manual shift transfer case applications
• White color with dichromate and plastic finish
• Female connector, male blade terminals, 3-terminal design
• Includes a four wheel drive actuator
• 100% tested for mechanical and electrical switching performance

Vehicle Fitment and Application

Compatible with a wide range of Chevrolet, GMC, Cadillac, and Dodge 4x4 trucks and SUVs. Fits 2001-2007 Chevrolet Silverado 1500, N/A, w/ Manual Shift Transfer Case; Fits 1999-2007 GMC Sierra 1500, N/A, w/ Manual Shift Transfer Case; Fits 1999-2000 Chevrolet Tahoe, N/A, Transfer Case Switch Fitment; and Fits 1983-1990 Chevrolet S10 Blazer, N/A, Mounted on Transfer Case. This part cross-references Dorman OE Solutions 600-502 for the same application. The Standard Ignition TCA-4 is also listed for Chevrolet Silverado, GMC Sierra, and related K-series 4x4 platforms across multiple model years.

What This Part Helps Resolve

• Inoperative or inaccurate 4WD indicator light
• Transfer case switch signal issues
• Intermittent 4WD status indication on the dash
• Electrical switching problems at the transfer case
• Corrosion or wear at the switch connector and terminals

Installation Notes and Tips

Verify the vehicle uses a manual shift transfer case before ordering. Match the connector style, terminal count, and transfer case mounting location to the original part. On applications such as Chevrolet Silverado, GMC Sierra, and related K1500/K2500/K3500 models, confirm the 3-pin or transfer-case-mounted configuration shown in the fitment data. The TCA-4 part number should be checked against the original switch before installation.

Quality Assurance

Standard Ignition builds this switch with robust materials and copper alloy conductors, then tests each unit for mechanical and electrical switching performance. The TCA-4 reflects the brand’s service-focused engineering for driveline and axle electrical components.