Two wires are for ABS sensor on
anti-lock brakes.
In damp weather Brake Rotors are very high temp steel and rust very easy. the rust can actually grow into shoe pads very slightly and bond pads to Rotors especially in damp clients.
If you look at a cars Rotors through the spokes or holes in wheels you can see rust after 1 day or so.
there is nothing wrong with your brakes. if they are completely locked up take off the wheel rim, take a punch and hit the bracke pads on the metal pad frame and the rim and tire will probably rotate then. drive the E-450 for two blocks and hit the brakes pritty heavy and you will notice the rotors will be all new and shinny again
Here in the Houston Texas area we have lots of humidity. when I put my E-450 Coach House in storage I go over to storage shed once a month start Gen set to exercise and drive my Coach house around the for 10 miles or so to keep my brakes from freezing. Note: every other year I take the wheels off (don't take the rotors off) remove the Calipers and grease them. (you can buy caliper grease at O-Rilies or pep boys or some place like that.) instructions included.
due to our High Humidity I also flush and replace the Brake fluid because the Brake fluid absorbs humidity from the air and small amounts of water accumulate in brake cylinders and if you get in heavy traffic or go down a mountain pass the water in fluid will BOIL when brakes get real hot, The steam will compress. you will not have any brakes whatsoever. when you get stopped you can wait 30 minutes or so and your brakes will come back after the water vapor has condensed back to water witch not compress. Always Put Ford Motorcraft Brake fluid in the system not a substitute.
I had this happen to me on two different occasions until I went to ford mechanics and ask them what was happening.
