Where is the headlight fuse on a 1981 corvette and how do you replace it. My booklet tells of it, but not how it replace it.

get a flashlight and get on yur knees and go down under drivers side under dash left of clutch arm on wall. there is a fuse box there. the larger one is under the hood next to the shock tower and controls more interior. make sure everything is plugged in well

1981 Corvette has an electical tachometer that is driven by impulses from the distributor. First, check for blown fuses, next make sure the tach wire is plugged into the distributor. Next bypass silver tach filter or capacitor located by manifold to see if the tach moves at all. If these steps do not reveal a change in tach operation, then the most obvious next step is to remove the tachometer and get a new board for the tachometer. Unscrew and remove cluster lens and then unscrew tach bezel, and gently pull out the tach noting position of insulators. I believe these boards are available still at local autoparts locations. Replace board, note position of insulators and reinstall tach, bezel and lens. Old corvette are cool and are pretty easy to work on! Should be fixed, enjoy!

I found layout at: http://forums.corvetteforum.com/c3-tech-performance/1950185-81-fuse-box-diagram.html

http://forums.corvetteforum.com/c3-tech-performance/1950185-81-fuse-box-diagram.html

hmm..there might be a fuse box under the hood or most likely in the dash or under the passenger or the drivers dash..hope i solved your problem :)

1981 corvette no power to the power seat need location of the fuse

you will need to pull off the four retaining nuts holding seat in place. Measure the length and width of bottom support frames. Many seats are interchangable.

Most of the time you will find that it's rotting rubber hoses. If these have never been replaced, they're 28 years old! Engine heat, exposure to the elements that splash up under the car, and age can rot them.

Also the actuator has a rod that comes out. This rod has a seal around it. The seal rots too. The actuator is the large vacuum cannister, that looks like two pie pans put together. It is down near the headlight. When you have the hood open, look down towards one of the headlights.
Sometimes the vacuum tank develops a hole. This can be patched. It's up on the side of the fender.

Here, let me show you the headlight mechanism,
http://www.mamotorworks.com/corvette-c3-headlight-actuator-linkage-parts-1-249-6088.html
I use this website for my parts, but this is not a link to them for advertisement. It just shows an exploded drawing, so I can explain better.

B is the Headlight Actuator. See the long rod coming out of the middle? Has threads on the end of it? Where the rod goes up into the cannister, there is a rubber seal. This dries out and cracks, and also wears through time. Corvette parts places (At least online I know they do) sell this rubber seal.

There is also a small check valve that can go bad.
You can buy the vacuum hoses in a kit. They are color coded, and have replacement instructions.

To review:
1.Check all vacuum hoses for drying and cracking. Actually squeeze them, don't just look at them. If they have a crack from your squeezing, they're shot! (You might find that some just crumble in your fingers! Oh, by the way. Dawn dishwashing soap, or GoJo takes that black rubber residue off of your fingers)

2.Start the car, let it build up vacuum. Shut the car off, and use the override switch, (Knob under the headlight switch you pull), to keep the headlights in an up position. Put your finger on that actuator rubber seal I described above, and see if you feel a vacuum leak.
If so, replace the seal.

3.It's a good idea to replace the check valve,
http://www.volvette.com/HE76.html

4.It's also a good idea to replace the vacuuum filter,
(Vacuum reserve check valve air filter) http://www.volvette.com/HE75.html

Try these Guys Chevy-Classic-Parts.com

Theres not enough information, sorry cant help you..