Working on my impala and i cant seem to get the blinkers to work properly. To make the blinkers blink you have to manually move the lever up and down. All the lights work as they should and the hazards flash also. Ive replaced the flasher and still no luck. Ive checked all the fuses and they are good also. The dash light even comes on but when the lever is pressed down the blinker just liggts up and doesn't blink. Any help would be greatly appreciated.