Help!! Break issue

I have a 2006 Tacoma prerunner. The front brakes are always engaged. I can feel them ease off and then engage again while I am driving down the road. I can actually hear my brake pedal moving while driving down the road. The rotors get so hot it creates a severe vibration in the front end of my truck. This is happening about 80% of the time while I am driving the truck. Any time the brakes are not engaged the vibration is not there. I have checked the booster and it seems to have good vacuum and the check valve seems to be working. Any help would be appreciated. I have went through a set of break pads in 3 months because of this issue.

 

Check calipers after driving with an IR gun. Normal temp should be around 150F. If hotter, one or more pistons stuck. A stuck piston can raise the temp to 300F+. Caliper replacement is the standard fix, maybe both since they're both probably the same age.
Good time to change fluid too, since water gets into the fluid over time, making rust in pistons, journals. The master is see-through so you don't have to open it to check the level and color, for this very reason.

 

It is passenger and driver side. They are way hotter than 150. You can fee the heat on your hand from a foot away.

 

Not sure about that. It is not black but it is definitely got a darker color to it.

 

Caliper piston seized, Its happens. Best bet is to replace your pads, warped rotors and both calipers and not have to deal with it for along time.

 

Will one caliper being seized cause the problem on both sides?

 

Each caliper has four pistons that slide in and out of piston bores in the caliper, pressing the pads against the rotor, thus applying the brakes. They will eventually corrode, rust and can seize up. They can be resurfaced/repaired, but it's time consuming and expensive. Most shops will recommend replacement as the best option. I've had good luck with rebuilds.
Do a brake fluid flush/refill. Water will condense in the brake fluid over time. Every time you open anything in the brake system, a little humid air gets in. You then bleed the air out, but the water stays. The master reservoir is see-through so you don't have to open it to see the level, for this very reason.