Does anyone know where the switch is located that activates the solenoid on the hood of 1974 corvette to open cowl induction thanks Keith

Yup...it's just above the throttle pedal...

                                           Air door/kickdown switch

I found switch not luck getting to work I used jumper and solenoid worked where does power supply come from and is there any fuses or fusible links that anyone may know of thanks again,  Keith

The diagram shows from the switch it goes to a fuse, ck power to 1 of the wires, if neither has power then it could be the fuse. if one has power then it would be your switch

It shows to be powered from the Radio fuse.
The problem could be now power to the switch, or the wiring from the switch to the solenoid, or the solenoid ground.
Check for 12v at one of the terminals on the switch connector first. If there is power at one of them, jumper the two wires together and see if the door flops.(if this is an automatic car, the switch will also have connections for the trans kickdown switch).
If you have 12v at the switch, and the door works with the wires jumpered AT the switch, then the switch may be bad. If the door does NOT work with the wires jumpered AT the switch, then you have a wiring issue between the switch and the solenoid. All tests need to be key ON.

btw...I just sent ya the wiring diagram via e-mail...Adams' Apple2009-03-20 10:13:29

I looked above if you jumpered the sw and the sol worked then the problem is the sw

Thanks for all the info will try, Keith