In general, if the police did not have 'reasonable suspicion' that you were committing an offense, or had just committed one, or were on your way to commit one, they may not stop you. However, having a defective turn signal is a (minor) violation of the traffic laws. The question is what the cop could see, not what was happening in the internal wiring of your car. You could try it, but it probably would not work.
Answered on Feb 04th, 2013 at 9:17 PM