I believe its in the fuse box, top left, square metal plug in
It doesn't have a relay but a flasher under the dash.
Under the dash near the fuse block.
The fuse box on a 1977 corvette is located at the top of the kick panel on the drivers side. It is just below the dash on the outside wall............7T77T7
Underneath the rear of the car, below the fuel tank.
Under the far left upper corner of the fusebox to the left of the brake pedal on the firewall
A Corvette that was built in late 1976 up to late 1977.
There are 2 flasher relays mounted in the same location. Both are located under the dash on the driver's side mounted on the passenger side of the steering column.
Turn signal switch is melting...replace the turn signal switch in the steering column.
what is the process for installing new seat covers in a 1977 chevrolet corvette
How do I replace the power window switch on 1977 Corvette coupe
Spark plug gap for a 1977 Corvette using ACDelco R45TS is .035
You can find a diagram of a 1977 Corvette horn assembly at your local library. Look in the car repair section for a Corvette repair book.