Im new here and hoping  for some help. When you push on the brake pedal in my 1973 240z  the left turn signal lights up on the interior and the exterior light is on. Any ideas what might cause this?

What happens if you turn on the left turn signal? Have you worked on any of the wiring? Remove the blinker relay thingy. See if it still lights up. Possible short in the system. Did you work on anything related to electrical? It’s a Z. Good luck.


Phil Smith

Check all your grounds...

 I agree with Patcon. A 3' piece of elec. wire with alligator clips is useful for adding temporary grounds to circuits. Frequently the problem vanishes with the addition of the temp. ground.