My work car developed an interesting problem last night when I was delivering. When I turn the headlights on the left turn signal lights come on. They dont blink, just light up and stay lit up and when I hit the left turn signal nothing happens, the right turns work fine and when I turn the headlights off all the turn signals work just fine. I'm thinking maybe the headlight switch? I've never had a problem with a light being stuck on so i'm kind of at a loss here...

I'm a pizza delivery guy and I make A LOT of left turns so this is kind of a problem haha

 

Oh I hate electrical issues. What happens when you turn on the hazzard switch with the headlights on and off? Has anything recently been done to the car. Do you have the wire diagram, look in the DIY section for a manual, and a volt meter/test light?

 

Look at the turnsignal bulbs & sockets. It sounds like the headlight (parking lights actually) is cross-feeding into the turnsignal circuit. The bulbs have 2 filaments, & 2 little contact nubs on the base. If a 1-filament bulb was (mistakenly) installed it can make a connection between those 2 different circuits.

One time I had an even more bizzare situation. The little nub on the base of the bulb had gotten mushroomed over where it touched the contact for the OTHER circuit. Same story, take out the bulbs & check them out & check out the sockets.