1975 Engine Harness Manual Transmission with Seat Belt Interlock System Wiring Harness. This system would not allow car to start if seat belt was not latched.
A commonly asked question and a much needed answer is "What does this harness" connect to?
1975 Corvette Engine Harness Manual Transmission With Seat Belt Interlock System Wiring Harness Connects to:
Learn more from the following Mid America Motorworks Knowledge Library article:
Corvette 1974-1975 Seatbelt Starter Interlock System