Help me please. Have early 80s chev pu...
Front L turn signal light comes on when brake is applied...
Seen a few of these on the road...
Could this be a chev problem? Or just an electrical problem? Is there an obvious answer?

Thanks, David

It is eletrical problem. Could be bad ground(s). A couple of quick test of bulbs and grounds
Turn on 4 way flashers, check and correct(replace) bulbs as necessary. Hazzard(4 way) is constant live circuit, and turn signals are ignition switched circuits.
Both run through signal head. Brake switch sounds good.
Can only be signal head or bad grounds(Bulb sockets).
Or someone touched wiring. No other possibilties. Bulb sockets Prime Suspect, check back and front sockets.Replace