My turn signal mirrors are not working in my 2002 Ford F-150 Fx4. The lights do not light up when either of my turn signals are on. I've asked my mechanic to check the fuses and he has said that all of the fuses are okay. I brought my truck to my local Ford dealership and I would have to leave it with them for 2 days to do an electric test and what not; however, I do not have the time for this as of now. Any ideas?