92 Toronado headlight doors don't seem to stop when doors are closed.

You may be able to find one on eBay. Have you checked the relays for the motor? There is one to open and one to close.

Not a Corvette expert, but I don't think sunlight would have any effect.
The motors should close the doors when you turn the lights off regardless if it is dark or not.
Are the headlights staying on, or just the doors staying up ? The up position is the default when something is wrong, so I think it takes voltage to close them.

As I remember it, the doors are closed until you turn the headlights on. There is a wire in the headlight switch that triggers the relay for the doors. What happens if you unplug the doors ? Does the relay send power to the doors ? Does the fuse still blow ?

Hello
This problem is more than likely the headlight door relay module, the relay is located in the top center of the dash where a speaker would be.
If the headlights do not come on as well as the door don't open then the problem may be the headlight switch, it controls the headlights and the ground side of the relay closing coil. The relay should be fairly cheap. The headlight switch is very cheap as well, to replace it you reach behind the switch and press the silver button at the rear top of the switch, at the same time pull the knob out, once the knob and shaft are out just remove the male threaded nut that secures the switch to the dash panel. Also make sure you like for heat damage to the wires in the connector to the switch, all the terminals should be bright metal, if they are discolored the connector must be replaced with a repair connector. See picture of switch below.

STANDARD MOTOR PRODUCTS Part # DS273T [headlight switch] $11.28

try using (led) lights thay last ten times longer than regular lights hope this helps

I have the same problem with my 93 Salon. Take a look at the torsion bar rod end close to each headlight.There are collars that have a set screw which can be loosened to adjust the range of the door opening and closing. If the doors are going through the full cycle open to close but fall back and leave a gap such as you describe, most likely you will only need to adjust those screws. Each door will require adjustment individually. May require an allen wrench. Hope this helps.

The headlight switch is called a multi-function switch. That is the problem, its going out, if you replace that, it will fix the problem, they run about $75 and are fairly easy to do yourself.

Your headlight motors are bad. Pre-87 cars had a terrible problem with this, upgrade them to the 87-up style. Firebird/Corvette motors are the same.

Check the sensors that tell the relay to shut off when the lights close down all the way. This is a fairly common problem especially if this has never been replaced before.