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If there is a problem ANYWHERE in the ABS system the ABS system shuts down and either the ABS light will come on and the often the red dash brake light will come as well. So, yes a problem with the tone rings, can/will illuminate the ABS light,.
Take the van back, ASAP, something is very wrong. This is not normal.
Follow the upper and lower radiator hoses to where they meet at the block. The thermostat will be near one of those 2 places and will have a rounded cavity with usually 2 bolts attaching it.
Cut or grind down the bolts enough so you can get the head off the engine, then you will have the longer studs to work with. When you get the head off, use a lot of penetrating oil, I mean soak them over night, to help you get the studs out with out ruining the block.
This will need a mode 6 diagnosis. It takes a really good technician to understand 'mode 6' diagnosis of failing monitors. First thing to check is make sure that your battery and charging system are in excellent shape, then study the performance of the oxygen sensors, because the catalyst monitors key on that. If it is too cold or too hot, the EVAP monitor will not even run, so be aware of that, since it is winter.
Really need to scan the ABS computer and see what the codes are, possibly something was damaged when the car was driven with out a rear tire.
https://repairpal.com/estimator?car_type_id=2653 ---click on this link, select service and go to the maintenance section, the info is all there.
If the shaking occurs as you brake, then the rotors are warped, which may have been caused by using an air impact gum to put on the lug bolts, this does happen. Either way take it back to the shop who rotated your tires and ask tell them about this new issue after you had them rotate your tires.
So, vacuum motors control the air flow between defrost and the ducts, so get up under the dash with a flash light and see if you can locate these devices that move the doors, then watch them, there could be a leaking vacuum diaphragm, that loses vacuum when you accelerate or a loose lever or some type of linkage etc. That is what I have to do to solve these issues on early 90s heater control issue.
Actually this truck has throttle body injection that is mounted in what looks like a carb. The flapper is for when you start the engine in very cold weather, it directs warm air into the intake so the air and fuel can blend and burn better. However, the flapper or ( thermostatic air cleaner ) needs to be open once the truck has run for awhile, or the engine will run poorly. The thermostatic air cleaner uses vacuum to operate the door.