My problem is the front turn signal (passenger side). It appears only one filament of the bulb is lighting up, and it doesn't blink at all when the headlights are on. I am getting a fast blink on the dashboard when the signals activated. Rear signal is working, and replacing the bulb did not fix the problem. Any ideas on what could cause this? Any help is appreciated, Thank you!
Make sure the bulb socket is free of corrosion so the new bulb has a good connection. Also make sure the ground wire for that light is good. The reason it works with the headlights off is because it can find a ground path thru that circuit.