I think my wheel cylinders is locked up but i'm not for sure

Do you have normal compression on all 4 cylinders, fuel to the injectors, and spark at the plugs ?

chock front wheels so car cant move jack up rear of car see if you can turn the wheel easley remoave tire .look onout side of drum on stud for hokding clips ,you can take them off with a screwdriver or just pry them off or turn them off back off adjuster tap lightely on drum and it should come off

Hi,
WHAT wheel(S) are not spinning? Front/Back/Left/Right?

Do you use your parking brake? If so, it may be stuck "ON" even when you release it.

Take it back to the mechanic and have them do a complete brake test. You're probably due for a brake job - brake pads and/or shoes, new rotors and/or drums.

GL,
Td

Rear wheel bearings on front wheel drive vans are much like front wheel bearings before front wheel drive.
You have an inner and outer bearing with a nut and lock washer.
After the bearings are packed with grease, you tighten down the axle nut until snug then back it off a notch. Then put the lock washer or lock ring on. Some have a cotter pin to hold the nut in place.
The wheel should spin with no drag from the bearings.

I do not think this is an abs problem but rather a out of round drum, this problem only happens when you are braking ? if this is the case then i would check the rear brakes.
First make sure the rear wheels are spinning freely, if you use the e-brake then make sure there is not a cable holding.i bad e-brake cable will sometimes not release the wheel or both rear wheels causing the brakes to stay on in the rear, they may not be on all the way but on to cause the rear drums to over heat and get out of round causing a bad pulsating when braking.
Jack up the rear of the car and make sure the wheels are free spinning, if they are not then you will need to find out if its a cable, bad adjustment or frozen wheel cylinder. If the wheels spin free then have some one step on the brake and see if wheels lock up then release the brake and make sure they spin. next is to do the same with the e-brake.If all is good then replace drums or see if they can be cut. The last thing would be if the wheels are free and the car shakes when driving along and not braking then you may have a bad tire or bent rim. good day.

Correct diagnosis, but make sure it isn't the left bearing. Jack the car up and check both wheels for play. If no play, start and put in drive (while still jacked up off both wheels), and listen to each side for the noise.

May have some air in your break pipe system bleeding the break fluid.

This could be a lot of things, CV joint, tie rods, wheel bearings, even loose lug nuts.

Hi First of all check the adjustment on the rear wheel thats sticking sometimes the brake pad comes away from the metal it is fixed to this maybe the case on your vehicle, the make & year of vehicle would help further but I a sure you got something to check now. Please leave me feedback, Malcolm Campbell.

remove back wheel and drum should come off sound like broken brake spings