2005 Lincoln LS Parking Brake Light On

“The parking brake light keeps coming on in my 2005 Lincoln LS. The parking brakes aren’t coming on or anything, as I put the car in neutral and it still rolls freely. I’ve had a local mechanic look at it, but he can’t find anything wrong. Please lend me a hand.”

Well, I fixed one like that about a month ago, and it was a REAL wild one. Your Lincoln has electronic parking brakes, which are computer controlled. And on the car I fixed, one of the coolant control valves had shorted out (which you’d think would have nothing to do with the parking brakes, but alas, that isn’t so.) This bad valve created some type of radio frequency that the electronic parking brake system picked up on, and would turn the parking brake warning light on because of this interference. When I replaced the bad coolant control valve and reset the Lincoln’s computer, the parking brake warning light stopped coming on. So definitely have a mechanic check that one out. It’s a solution that isn’t going to be easily discovered otherwise.