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If the emergency flasher works, the turn signal lever switch or the wiring to it is most likely the problem. If one lamp does not work even when a new bulb is installed, but other lamps do, check the wires for cuts or breaks, and check the connection of the ground wire to the body - corrosion of the ground terminal or the body steel around the connection screw can be an age-related problem.
If neither the turn signals nor the emergency flasher blinks the signal lamps, see if the brake lights work. If they do, check the wiring to the flasher unit, particularly if someone has worked under the dash to change the radio or do other maintenance, or if something on the floor was pushed up under the dash. Remove the flasher and check for voltage on the flasher socket with the emergency flasher turned on.
pickup a test light and check all the fuse if the fuses are good then you probably have a bad signal flasher.make sure you change the signal flasher and not the emergency flasher as they look the same.
The emergency flasher switch is also the turn signal flasher It pops out of the dash and can be replaced easy. do chaeck the fuses before going to this much troble. check all the fuses as some work backup circuits that you wouldn;t think would be important. Before replacing the flasher switch ( you may only be able to buy it from the dealer) work the switch several times and the flashers will come on cheak to see if allthe lights work thenturn the flashers off and see ( with the key on if the turn signals now work. Now if during the test with the four way flashers you see a bulb or more out you know that the turn signals wouldn't work, but the four ways will. they work on different fuses so chak the turnsignal fuse too. after cycling the switch try the turn signals again as the switch is likly to stick and sometimes cycling it will get the turn signals working again. Fooling around with the switch you may find a position that the turn signals work. if you can't get it to stay working then you'll have to change the flasher emergency switch.
First check fuse. If ok be aware the emergency flashers are on its own side of a electronic flasher. Turn signals have their own circuit on either a seperate flasher or the other side of an electronic flasher. One side may work & not the other.
When you select left or right do any of the bulbs come on? If you select left check front and back left side if one of the bulbs did not come on the flasher will not work. Change the bulb that is out. Same with the right. If the fuse for the turn signal is good (check fuse or replace do not use visual, some appear to be good but are not).
The emergency flasher is different from the turn signal flasher. Look at manual for location of turn signal flasher. If you manually lift and lower turn signal control you may hear a clicking under the dash to locate the flasher.
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