1994 c4 corvette were is the horn relay locatate.

SOURCE: In my 1994 c4 corvette, when starting car you

bad starter solenoid will also do this the contact wheel inside gets burn scars on it especially when starting with a weak battery.

SOURCE: 99 CAVALIER HORN RELAY LOCATION

If your horn isn't working and it isn't the horn itself the next thing to check is the horn wire in the steering wheel under the air bag. The little clip breaks off in time and the horn wire pops out. To repair you can remove the wheel and replace the part but I usually grind in a new notch in the old plastic and re attach the wire and it will work again.
Test the horn itself first. Just remove the connection to the horn and attach 2 wires to a live battery and tough the 2 sides of the contacts on the horn. If it blows the horn is good. If not replace the horn before you go any further.

SOURCE: trying to locate fuel pump relay for 1991 corvette- coupe

The fuel pump relay in the 1991 corvette is located under the IP on the pass side.
Open pass door, unscrew two screws under the glovebox (you will be upside down in the car), take off the fuse panel, unscrew third screw to plastic plate underneath glovebox, pull away carpet (velcro), pull down plastic plate (watch out for the wiring to the lamp), then under the glovebox you will find a number of fuses and relays if you dive in under there DEEP, prob 4 or 5 in a row, not really sure wich one, but one in the middle is the fuel relay, and they are the same (interchangable).
Take a look at --the12volt.com/relays/relays.asp--
It´s those relays we are talking about.

SOURCE: Replaced horn relay on 1977 Corvette, horn still

check for power at the horn, the relay sends the ground

SOURCE: I cannot find the location for the Horn Relay on

It should be plugged into the fuse panel on the firewall. Here is what it looks like.

http://www.ecklers.com/product.asp?pf_id=20494&dept_id=1723