Standard Ignition TCA-8 4WD Indicator Light Switch

4WD Indicator Light Switch for Dodge Ram

Standard Ignition TCA-8 is a 4WD indicator light switch built for Dodge Ram trucks and vans that use a 2-terminal configuration. It combines a black housing, female connector, and bullet-style terminals with aluminum and plastic construction for service-focused replacement work.

• 4WD indicator light switch for transfer case signal applications
• Black housing with female connector gender
• 2 female bullet terminals for direct electrical connection
• Aluminum and plastic finish for underhood and driveline service use
• 100% tested for mechanical and electrical switching performance
• Copper alloy conductors for strong electrical conductivity and low resistive loss

Detailed Product Overview

Standard Ignition TCA-8 is engineered for vehicles that need a reliable four wheel drive actuator signal at the switch level. The design uses copper alloy conductors to support consistent current flow, while the robust housing materials help it stand up to the demands of driveline service. This part cross-references Dorman - OE Solutions 600-550 for the same application.

Compatible With 1990-2002 Dodge Ramcharger, Dodge W150, Dodge W250, Dodge W350, Dodge Ram 1500, Dodge Ram 2500, Dodge Ram 3500, Dodge Ram 1500 Van, and Dodge Ram 2500 Van applications where the 2-terminal fitment is specified. Standard Ignition TCA-8 is a direct-fit service part for technicians replacing a worn or failed 4WD indicator light switch on Dodge Ram trucks and related models.

Common Problems This Part Can Address

• 4WD indicator light stays on or does not illuminate
• Intermittent transfer case signal to the dash indicator
• Faulty switch contact causing inconsistent 4WD status feedback
• Electrical connection issues at the 2-terminal switch interface
• Wear-related failure in the original indicator light switch

Installation Notes and Tips

Verify the vehicle uses the 2-terminal fitment before installation. Match the female connector and bullet terminal style to the original part, and confirm the transfer case switch location and connector orientation before reconnecting the harness. For best results, inspect the surrounding wiring and terminals for corrosion or damage during replacement.

Quality Assurance

Standard Ignition tests this switch for both mechanical operation and electrical switching performance. The part is built with durable materials and copper alloy conductors to support dependable service in driveline and axle applications.