Follow this procedure. It may take a couple of times to get it right, but it works.

1.) Ignition off, doors closed
2.) Hold the wiper switch in the full up position. (this is the wiper off position)
3.) While holding the wiper switch in the full up position, turn the IG on. (two presses of the start/stop switch)
4.) Hold wiper switch in the full up position for 5 seconds
5.) Move the wiper switch down one "click" or "notch", hold for 5 seconds
6.) Move the wiper switch back to the full up position, hold for 5 seconds
7.) Move the wiper switch down one "click" or "notch". hold for 5 seconds (same position as step 5)
8.) Move the wiper switch back to the rest position (neutral)

If this was done correctly, the right turn signal will flash once.

To adjust how many flashes you want, you change the intermittent wiper speed switch. P1 starts with the speed switch all the way at the bottom, P4 will be the top speed. This is found on the wiper stalk.

P1: 3 blinks
P2: 5 blinks
P3: 7 blinks
P4: Function turned off

Set the intermittent wiper speed to the desired setting.

Use the Turn Signal stalk and push down like you want to activate the left turn signal, the flashers should activate

If the turn signal blinks once, you change it to the "3 flashes" setting
If the turn signal blinks twice, you changed it to the "5 flashes" setting
If the turn signal blinks three times, you changed it to the "7 flashes" setting
If the turn signal blinks four times, you turned the function off.

Once this is done, cycle the ignition switch off, and back on, and it should be changed.