Left turn signal wont shut off

I turn on my lights and the left turn signal comes on, not blinking just lit. Then when I turn on my left bliker it blinks as normal. What would cause it say lit all the time?

Bad ground for that socket. The parking light doesn't have a ground, so it finds one by back-feeding through the turn signal circuit.

The bad ground is in the parking/turn signal socket - usually the front one for that side. Solution replace the socket with new one for $5 from Autozone etc. The socket is a ford 3 wire style and you can find it in the electrical section listed that way. Simple repair - to cut wires on old one and spice on the wires for the new one. Greg