Re: 1985 Grand Marquis Starter Keep Running PLEAZZZZZ
Could be. When things stick on or off, I gently tap with a hammer to see if they unstick. What happens when you pull the small wire off? If the starter stops turning when you pull that small wire off the relay, it could be a problem in the key tumbler. If it keeps going, I'd guess the solenoid is shitty.
Make sure you have a way to keep the starter from cranking all the time when you do these tests or you'll end up buying a new starter again.