Turn Signal Problem

faulty flasher, bad bulb, or bad ground. I would check the bulbs first. Fronts and instrument do the ground for the system.

Im not sure on the years but my mustang has a 2 element bulb on for tail lights the other is shared by the blinker and brakes. if they are the same its probably not going to be a bad bulb due to the fact that the chances all 4 went out at the same time. Do you hear the click when the blinkers are engaged? If so then its probably not your flasher that is messed up. Probably not a wire for the same reason as the bulb, but it could be.

First thing you should do is get a diagram of the layout of your system from a manual. There is probably a connector for the wires coming out of your steering column. Use the manual to see what color wires go to what. Take a test light and see if you have correct power for each wire. You might find that the flasher wires are not getting power and you will need to replace the turn signal switch. If this is the case, replace the whole thing not just the cam. I ended up making a problem worse by trying to replace just the cam.

if there is no click then it might be the flasher, check and see if its getting power when the signal is engaged. should be under the dash.

My suggestion was due to the opposite "bright element" in the bulbs working. the system kind of grounds itself cross-ways. Plus 2 screws and you can look at the bulb.