Yep. Had the same problem on my 86. Changed the fan,sensor and relay.If you jumper the outer terminals on the relay connection you can tell if the fan works. If it does fine but the signal to 'throw' the relay from the ecm isn't working.Check with a test light for this signal.If ok replace relay.
prob have a bad ignition switch
First guess would be a bad switch.
contact a local Chevrolet dealr they will be able to confirm that
Bad bulbs?Bad Hi-low switch?
Once again, seeing that I don't know a whole lot on the C4 Corvette I would ask this question in the C4 technical section on Smokinvette.com and get a dead on answer! Good luck!
check the fuse for ingnition
A friend had the same problem with his 87 Corvette . His was the chip in the ignition key . Had to replace ignition switch and key , about 40 dollars for the parts .
Depending on the year it is 5 or 6 qts. LS1 style engines would be 6 qts.
Since there was no 1927 Corvette the answer would be NO.
BAD BRAKE LIGHT SWITCH AT TOP OF BRAKE PEDAL
Corvette. Anyday
Try changing the headlight switch.