look in your owners manual if you have it.
There is no such car as a 1989 Monte Carlo
Check for a blown fuse. If the fuse if OK, replace the Flasher Relay.
i have a 96 Monte Carlo and i had the same problem. try pulling the turn signal switch to you slightly while in the signal position. works for me every time.
In all likelihood, in a relay box, under the hood. Failing that, it ought to be in the fuse panel, inside the car.
Above the radio there is a button with red triangles on it. That is where the turn signal flasher is. You have to take the dash off to get to it.
In a 1987 Monte Carlo, the turn signal flasher is typically located under the dashboard, near the steering column. It can usually be found in the fuse panel area or attached to the harness. To access it, you may need to remove the lower dash cover or reach behind the dashboard. Consult the owner's manual for specific diagrams and locations if needed.
Part of the hazard warning module
you probably need a new turn signal flasher .
Check out this web site: http://tss.likeabigdog.com/
Probably turn signal flasher
The turn signal/hazard flasher is integrated into the flasher switch. A very common failure on these cars.
I had this problem with my Monte Carlo, I think it was that I needed a new turn signal switch. I think there was a sensor or something that was broke too?? But I believe the dash panel lights not working at night had something to do with a short in the turn signal switch.