Probably the flasher unit needs to be replaced. This is an electronic switch which usually mounts underneath the dashboard.
signal lights not working.
I have a 93 deville,still have not found the turn signal flasher and the signal lights stopped working,but after checking if all the lights were working I found one small blub burnt out in the back set of lights,I removed it and signal lights started working again if anyone find the exact location please post,4 way flasher is easy to find ,signal flasher a problem On the 92 deville, the turn signal flasher is on the driver side (Left side) of the steering column. It is above the fuse block and is difficult to see. Move the wires and you will see that it is close to the hood release.
Try replacing the turn signal flasher
If the turn signals on a car works but the hazard lights do not there may be a problem with the flasher switch. The flasher is located in the steering column, and a damaged unit can cause the lights to stop working.
you need to change the flasher can for the signal lights
It could be the turn signal switch in the steering column.
First check the fuse if none of the lights even come on. If the lights come on but do not flash then the flasher relay is defective and needs replacing. If the fuse, light bulbs, and flasher relay are good then the turn signal switch may be the problem.
do you hear clicking noise -as if the inficators were working? If not then go check the flasher relay and its connections.
First check the fuse, then the bulbs, then the flasher relay, then the signal switch.
Buy a "highway" turn signal flasher
If your hazard lights don't work but your turn signals do work it could be that your Hazard Lamp Flasher needs to be replaced. Your car has both a "hazard lamp flasher" and a "turn signal lamp flasher". Your "turn signal lamp flasher" is working but your "Hazard Lamp Flasher" may not be working. Buy a new "hazard lamp flasher" and install it. The hazard lamp flasher is located behind the instrument panel to the left of the steering column.
fuse If your flasher goes bad, You can still have flashers and no turnsignals. I would change the flasher after checking the fuse. == == If you have an adjustable steering wheel, try adjusting up one click. There is something about the setup that causes a wiring short.
Look for either a blown fuse or replace flasher unit for the signal lights (it is separate from the hazard lights flasher unit).
Well, you don't state the poblem, but if all your turn signals are not working and flashing as they should, replace the Turn Signal Flasher Relay.
If neither signal light works, the flasher may very likely be the problem. The hazard lights and the signal lights work off different flashers.
Check the fuse, and the Turn Signal Flasher Relay. The hazzard lights have a separate relay.
You have to start by checking the bulbs or the flasher I think it may be the flasher.>>>>>>>>>>>>>
Most likely turn signal flasher
Bad turn signal flasher.
Blown fuse or bad flasher unit. Often, cars use different flasher for the turn signals and the flasher, so it is possible for the hazards to work and not the turn signals.
Check the bulbs Check the flasher
If your fuses are good, the flasher is good, and the bulbs are good; There are two probable causes: Your signal switch is worn out, or you have a short to ground on the wires to the signal lights. Pick one or the other, or could be both.