Standard Ignition TCA-6 4WD Indicator Light Switch

4WD Indicator Light Switch for GM Trucks and SUVs

Standard Ignition TCA-6 is a 4WD indicator light switch built for direct service on select Chevrolet, GMC, Oldsmobile, and Isuzu applications. It uses a durable black housing, a female connector, and a 2-terminal bullet connection to support reliable transfer case or front axle signal switching.

Built with copper alloy conductors and tested for mechanical and electrical switching performance, this Standard Ignition TCA-6 replacement is suited for 1995-2005 Chevrolet Blazer, 1983-2004 Chevrolet S10, and other listed GM 4x4 platforms that rely on accurate four-wheel-drive indication.

Key Features

• 4WD indicator light switch for driveline and axle service
• Black finish with dichromate and plastic construction
• Female connector and female terminal design
• 2-terminal bullet connection
• Copper alloy conductors for low-resistance electrical flow
• 100% tested for mechanical and electrical switching performance

Detailed Description

Standard Ignition TCA-6 is engineered for vehicles that need a dependable signal switch for the four-wheel-drive indicator circuit. The robust construction and quality conductor materials support consistent electrical contact, while the 2-terminal layout matches the listed OE-style applications. This part cross-references Dorman OE Solutions 600-504 for the same application. Common search terms for this part include 4WD indicator light switch for Chevrolet S10, transfer case switch for GMC Jimmy, and front axle switch for Chevrolet Blazer.

Compatible With 1995-2005 Chevrolet Blazer, front axle right side; 1983-2004 Chevrolet S10, front axle right side; 2002 Chevrolet Trailblazer, right side of transfer case; 2002 Chevrolet Trailblazer EXT, right side of transfer case; 2002 GMC Envoy, right side of transfer case; 2002 GMC Envoy XL, right side of transfer case; 1996-2002 Oldsmobile Bravada, right side of transfer case; 1991-1994 Oldsmobile Bravada, right side of transfer case; 1994-2001 GMC Jimmy, front axle right side; 1991-2001 GMC Sonoma, front axle right side; 1998-2000 Isuzu Hombre, 2 terminal fitment; 1983-1994 Chevrolet S10 Blazer, front axle right side; 1983-1990 GMC S15, front axle right side.

What It Helps Fix

• Inoperative or intermittent 4WD indicator light
• Faulty transfer case position signal
• Incorrect front axle engagement indication
• Electrical switching issues at the 4WD control circuit
• Corrosion or wear at the original switch connection

Installation Notes and Tips

Verify the connector style, terminal count, and mounting location before installation. This part uses a female connector with 2 bullet terminals, and listed applications place it on the front axle right side or the right side of the transfer case depending on vehicle platform. Confirm the vehicle year, make, model, and drivetrain configuration against the fitment data before replacing the original switch. Standard Ignition TCA-6 is also searched as a 4WD indicator switch for GMC Sonoma, Chevrolet Trailblazer, and Oldsmobile Bravada applications.

Quality Assurance

Standard Ignition uses a robust design with high-grade materials, copper alloy conductors, and full mechanical and electrical testing to verify switching performance before release.