2003 Buick Century with erratic turn signals. sometimes they work sometimes they don’t. A fuse cannot come and go so I decided to check the flasher. The flasher is located behind the left side of the dash.
Remove the fuse cover and then the lower dash cover and metal bracket in order to gain access.
The flasher is the lower part shown in the picture. This picture was taken from the right side of the steering column looking back towards the driver’s door.
The wiring harness tab has to be pushed in to release it from the retainer shown at the left of the flasher.
The relay has to be released from the mounting retainer.