Hey people, try this one: No left side brake lights and the left side turn signal lights are very very dim. Ideas? 1971 240 Z. Thanks. cliff

Check the ground wire at the lights. Jump it directly to a bare metal part connected to the body. Just make sure you are grounding the right wire! Grounding a hot wire can be quite enlightening ;-)

If it is the ground, the lights will work properly when the jumper is in place. You can either start checking all the connections until you find the corroded one, or make a semi-permanent jumper wire.

I solved the problem by removing,cleaning and resetting the turn signal switch. This is a monster to work with because the parts are so small and a very delicate setting is required to get all the contacts to come together properly relative to each setting of the switch. It takes a lot of patients and in my case assembly and disassembly more times than I wish to remember. I was lucky that the little tabs that hold the whole thing together did not break off at any point.