Do they blink normally when the headlights are off?
Check all your gound straps.
You should have one from the negative battery terminal to the body, one from the battery to the motor, and one from the motor to the fire wall.
Also, do your hazzard flashers work?
If they don't, you might investigate further.
are all your ground wires good and tight.
I had a car once that I learned that lesson on.
When I turned on the left turn signal the dash lights would blink, right one, the buzzer would go off. When I honked the horn, everything would turn on.
Unfortunately I don't know what else to tell you.
Good luck and keep us posted.
blinker problem
