If the signal fuse was blown, the left signals wouldn't work either. Put the hazard flashers on, then compare the left and right sides, particularly on the rear. There's usually two signal bulbs in the rear. If one of them is burned out, not enough current will flow through the heater in the flasher to make it turn on, so all the bulbs will be off when the signal switch is turned on. Heavy duty flashers work differently. They start out turned on, then current flow through the bulbs and heater makes the flasher and bulbs turn off. Hazard flashers are usually heavy duty units because they have to operate more bulbs. You can try switching the two flashers so you can see which bulbs light up and which ones don't.
If only the right front signal doesn't light up, suspect a broken wire, corroded socket, or bad ground connection on the body. Check the parking / tail lights too. A bad ground or ground wire will affect the parking light, (which is in the signal light bulb), and possibly the side marker light and headlight. If the headlight is affected, it will be very dim, not out completely.
The signal switch can cause one front lamp to not work too, but then the bulb should work with the hazard flashers.
Thursday, May 21st, 2009 AT 2:21 AM