[Tim Cole]

The problem of the eyelids opening up too soon is a common problem with our Birds.
The eyelids should stay closed for a week or so. If not, there are some fixes that most guys can deal with effectively--if you're patient.
In order of priority here are the sources of the problem:

1) Leaky headlight switch (located under the dash). Even new NOS switches leak due to sitting on the shelf for 30 years. Place your head under the dash (motor off) and listen for a subtle hiss. The hiss may be imperceptible. Make sure the three vacuum hoses are fitted securely to the switch itself.

2) Leaky check valve: small aluminum valve (three hose connections) located on the driver-side fender skirt.

3) Poor connection of vacuum line to the vacuum port on the back-side of the intake manifold. Remove your air cleaner. Use a strong light to inspect the connection. Cut off a bit of the hose and re-plug it in to the port.

4) Vaccum air tank: the tank where the vacuum is stored (to keep the headlight covers closed) is located under the front-portion of the driver-side fender (out of sight). You access it by removing the radiator overflow tank and the two horns. Notice the vacuum line plugged into the side of the tank. Check for a leaky connection there. Cut off some of the line and re-plug it in. The tank may have developed a leak as well.

5) Removing the tank: Remove the three bolts that hold it in place. Two underneath, and one on the fender jam. It will take some jostling to remove the tank. Take the tank to a radiator shop and ask them to check for air leaks. They should be able to re-seal the tank.

6. Check for cracked hoses. The vacuum lines may have developed cracks. Inspect all hoses under bright lights. Replace as needed.

Hope this helps. Best wishes. Tim