Steve Michael gives your taillight a quick check-up. From the March 1993 Registry newsletter
One big problem with older Type 34s is their lights and brake lights get dim due to corrosion and poor connections, which can create some real problems for drivers behind you. It's bad enough having a car that is so rare that you can hardly find parts, but the last thing a Type 34 owner needs is a rear end collision due to poor rear lighting!
Solving the problem of weak rear lights is easy and quick. First, always disconnect the battery strap.
Next, remove the small screws from the real tail lenses and take a good look at the two screws that hold the tail light assembly to the body of the car. If the car has been painted, the metal under the screws gets painted also, making the connection very poor. Also if the screws are not real tight, the connection will also be bad. So, scrape off the paint under the 2 screws and tighten them down. The next problem with these 2 screws are they are self-taping, therefore they tend to strip the metal hole, not allowing a tight connection.
To fix this, remove these screws and disconnect the 3 wires to the bulbs (note locations for reconnection). Install 2 1/8" spring steel sheet screw clips (try your local hardware store for these) to the body area over the securing hole. Use 2 new 1/8" sheet metal screws and retighten the rear light assemblies to the body. Once right, they should produce a bright and sharp light connection. Don't forget to reconnect the battery strap, and then test the rear lights for a noticeable difference. I back-up next to a plate-glass window and look at the reflection in the glass.
One helpful note for removing the rear tail lenses (which fit rather snugly into the assemblies and are difficult to get out): use a light coating of Vaseline on the tail lense seal or the lense rim that touches the metal assembly. This will ease removal next time you need to change a light bulb.