Hey all,
My problem was interior dome light always on, and 2 beeps when setting the car alarm, when normally, it's 1 beep.
After reading this thread, I noticed a few folks had tried WD 40 in the door jams and trunk jam.
I whipped out the WD 40 and sure thing, it fixed the problem!! Yeah!!
Definitely worth researching the issue instead of taking it to a shop right away.
Thank you guys so much!! My mustang means the world to me. I thought it was going to be something way worse, but it wasn't.