My excursion theft idiot light is flashing when I exit the vehicle and now my autostarter will not work. How do I deactivate the theft light. My autostarter is a Astro starter.
Auto starter is a remote starter? Many remote starters fail, and if this one is 9 years old you did better than most. The remote starter is probably part of, or the entire, problem. See if it can be removed.
When remote starters go bad, all kinds of wierd electrical things can happen because they are wired into many of the cars electrical circuts. Your best bet is to go to a car audio installation shop and see what they will charge to take the remote out of the car.
I agree 100% with UncleTurbo.