I tried to search for this scenario, no luck maybe some has seen this.

My Driver side Brake light does not go on, I did replace the bulb. However when I put the turn signal on, the light does flash and work.

Any suggestions, do I need a new housing unit?

 Swap the passenger side bulb with the driverside bulb and see if the problem follows. If there is no change, use a test light to check for power at the contacts inside the socket. If there is no power at the contacts then back probe the wires going to the light socket.

As Darryl says, check the bulb, and the contacts first. If that don't work, you don't really wanna hear what the real problem most likely is....the turn sig. switch...

Light works and turn signal works, but not when I press the brake down. ????????????????

wonder if it could be the brake light switch as the bulb uses the same filament for the blinker and the stop light so you can assume the wire has no break in it and contacts are ok. i would think the brake switch or maybe as joel said the blinker switch. just another thought wonder if anyway the blinker relay is bad.

If the turn sig works, the wire is good from the turn sig switch, but the switch can keep the brake light from working.Adams' Apple2007-05-02 20:05:02

Thanks, That makes sense, is there one switch for both sides? One side is working. Where would it be located? I checked Corvette America and do see the swich, what does the Cruise control have to do with it?

The brake power goes thru the turn sig switch before it goes to the lights. This keeps the front turn sigs from coming on when you press the brakes. Think of how the Hazard flashers work...all four(frt/rear) turn sig lites burn. But...when you use the brakes, you don't want the frt. sigs coming on, so the circuits are split in the t-sig switch.
It(brake lites) can definitely work on one side, and not the other if the t-sig switch is faulty on one circuit.
The t-sig switch is different if you have factory cruize, because of the cruize circuit built into it. So, if your car has cruize, you would need to replace the t-sig switch with the same type.

Joel,

Does this mean taking the switch and all respective wiring out of the column and replacing? 

MichaelRay, new on here, has the same problem on his '75.  We have been chasing it for months now and can't find it.

Can you provide a brief overview of the R&R procedure?

Thanks,

dennis, the switch comes with the wires attached so you would have to fish them down the column to where they plug in. there are two different switches for a 75. regular cloumn switch and one for tilt/telescoping column.
ecklers has them, part a8641 and a8642. you can go to their site.