Standard Ignition 4WD Indicator Light Switch P/N:TCA-8
Know at a glance when four-wheel drive is engaged with the Standard Ignition 4WD Indicator Light Switch TCA-25. This four wheel drive indicator lamp switch is designed to signal the dash indicator lamp when the 4WD system is engaged. It is a direct-fit replacement for the 1981-1986 Chevrolet K10, K20 and K30, the 1981-1991 GMC Jimmy, the 1981-1986 GMC K1500, K2500 and K3500, the 1987-1991 Chevrolet Blazer, and more. See the Buyer's Guide tab for the full list of applications and engine details.
Signs this part may need replacing: The 4WD indicator lamp stays dark when four-wheel drive is engaged, stays lit in two-wheel drive, or flickers. If a worn or failed switch is the cause, the TCA-25 replaces it. Check the bulb, wiring and connector too before replacing the switch.
Interchange: FWD37 · 14037986
This part cross-references / interchanges with the following part numbers:
What does the Standard Ignition TCA-25 switch do?
It is a four wheel drive indicator lamp switch designed to signal the dashboard 4WD indicator lamp when four-wheel drive is engaged.
Which vehicles does the TCA-25 fit?
It fits listed Chevrolet and GMC applications such as the 1981-1986 Chevrolet K10, the 1981-1991 GMC Jimmy and the 1987-1991 Chevrolet Blazer. See the Buyer's Guide tab for all 31 applications.
What are signs the 4WD indicator switch may need replacing?
Signs include a lamp that stays off with 4WD engaged, stays on in 2WD, or flickers. These may be signs of a failed switch, so check the bulb, wiring and connector before replacing it.
What part numbers does the TCA-25 interchange with?
It interchanges with FWD37 and 14037986.
Is the TCA-25 a direct-fit replacement?
Yes. Standard Ignition lists the TCA-25 as a direct-fit OE replacement for the listed applications, and the switch undergoes extensive testing for reliability.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.