Get a clear dashboard signal when four-wheel drive is engaged with this Standard Ignition switch, the TCA-6 Four Wheel Drive Indicator Lamp Switch. It is a direct-fit replacement for the listed applications and fits many vehicles, among them the 1994-2004 Chevrolet S10, 1995-2002 Chevrolet Blazer and 1995-2001 GMC Jimmy; see the "Vehicles it fits" section for the full list.
Located at the front axle, the switch signals the 4WD indicator lamp so the driver can see when four-wheel drive is engaged. A failed indicator switch can leave the lamp dark, keep it lit, or make it flicker. If this switch is the cause, the TCA-6 replaces it.
- Tested switching: Every unit is 100% tested to verify both mechanical and electrical switching performance.
- Copper alloy conductors: Designed for strong electrical conductivity with low resistive losses.
- Quality control: Standard Ignition is a global maker of original equipment ignition products. It keeps quality control over the whole manufacturing process, from componentry to finished product.
- Built for technicians: Backed by decades of research and development aimed at the technician's needs. It has a robust design and high-grade materials suited to the demands of today's service professional.
For engine-level fitment details on each vehicle, see the "Vehicles it fits" section.
Interchange: FWD21 · SW3466 · FWD23 · 15598481 · 8155984810
This part cross-references / interchanges with the following part numbers:
FWD21, SW3466, FWD23, 15598481, 8155984810
Frequently Asked Questions
What does the Standard Ignition TCA-6 switch do?
It is a four wheel drive indicator lamp switch. It signals the dash indicator lamp so the driver can see when four-wheel drive is engaged on the listed vehicles.
Is the TCA-6 the ignition switch for a 1994-2004 Chevrolet S10?
No. Standard Ignition is the brand name, but the TCA-6 is a 4WD indicator lamp switch. It is not an ignition switch or an airbag switch.
What are signs a 4WD indicator switch may need replacing?
Signs include a 4WD light that stays off when four-wheel drive is engaged, stays on after you disengage it, or flickers. Diagnose first, because wiring or other parts can cause the same symptoms.
Which vehicles does the TCA-6 fit?
It fits many vehicles, among them the 1994-2004 Chevrolet S10, 1995-2002 Chevrolet Blazer and 1995-2001 GMC Jimmy. See the "Vehicles it fits" section for the full fitment chart.
Is the switch tested?
Yes. Standard Ignition 100% tests these parts to verify both mechanical and electrical switching performance. The switch also uses copper alloy conductors designed for low resistive losses.
