Probably either in the "convenience center", located at the driver's side kick panel, or
inside the steering column housing.
check your fuses first, then check your bulbs and then your relay.
The dimmer switch is part of the turn signal stalk. To operate it, pull it toward you and release. You'll hear an audible click when it operates. If you pull it only part way, you'llengage the "flash to pass" feature.
Check the fuses
To replace a turn signal switch on a 2003 Pontiac Aztek, also known as a flash relay, the steering column must be removed. The flash relay is located under the turn signal. Remove the mounting hardware and the unit can be taken off.
You need to replace the failed TURN SIGNAL lamp. Select turn signal selector to direction which flashes fast then check which exterior light is out. Go to any auto parts store. The light usually costs under $5 and can be replaced easily.
u have a blown headlight. change both bulobs and it will stop.
If a check engine light is flashing that means an engine cylinder misfire has been detected
If a signal light stays on, but does not flash on a 1989 Pontiac, there could be a light burned out in the turn signals on the exterior of the vehicle. It is also possible that the flasher unit has gone bad. The flasher unit is under the dash on the driver's side.
I think I'd replace the turn signal flasher. It's just a little bi-metal switch and can go bad easily.
You have a bad relay. Your blinkers run on a different relay than you hazards do.
You could be hitting the flash feature on the turn signal arm when you use it.
1941