92 Gr Caravan ABS system stop working

Something is wrong with your statement
it is a 99 caravan 3.3 no abs , then you are on about abs light pump etc
the abs pump only works when the master cylinder is under pressure and that pressure is suddenly reduced by the sensor reading a locked wheel and a valve is opened to release line pressure to that wheel As soon as that wheel starts to turn, the valve closes
while the wheel is stopped and that valve is open , the abs pump kicks in to maintain line pressure otherwise the brake pedal would go to the floor
master cylinders work through a. abs unit and not because of it so if the master cylinder becomes faulty, the abs pump will not operate until a wheel stops turning as there is no line pressure to stop a wheel turning
the abs light may not be on because there is nothing to operate the system to put it on

the ABS is anti brake skid which is designed to stop wheel lock up under brakes and allow steering control at all times
it was originally designed for aircraft to stop the under carriage from being ripped from the plane when the wheels (under brakes on landing ) hit a wet patch , snow or ice on the runway
it works by each wheel having a segmented sender that is read by a sensor and this impulse switches on valves in the electric pump in the hydraulic system so that when the wheel stops turning ,brake pressure to that wheel is released momentarily and then reapplied when the wheel turns again
the person using the brake still feels the same brake pressure under the foot and in extreme situations will feel the brake pedal pulsate
Now the ECM continually monitors the ABS system and when fluid sensors, or electronic sensors fall outside set parameters , the ABS light comes on to let you know that there is a problem with the brakes
you should now be having the fault codes read to find the reason for the light and have it repaired as in some systems ,if the repairs are not effected then the vehicle is put into limp mode by the ECM and that reduces the power available and the speed of the vehicle.

on that year vehicle or any vehicle for that matter . ABS has nothing to do with power brakes . Behind the master cylinder is the power brake booster , vacuum controlled . ABS is a system all to it's own . Think you may have thing's mixed up . You may have a vacuum leak or the brake booster is bad . Is the ABS light lit on the instrument cluster .

check brakes as sensors for anti lock brakes will start flashing and and doing things when brakes less than 25% if not that it is probably the abs sensor

Abs control valve it's a big unit under hood with all the brake lines going to it then out of it to calipers. It has wire harness connector un plug it and try brakes aware that abs won't work but brakes will operate be careful until this is verified if pulsing stops that control valve has a problem. My advice is to never buy another Volvo I won't I had one

The ABS light is most likely a bad Wheel Speed Sensor.

The Blower is most likely a Blower Resistor that rusted away. You should have a couple of blower speeds left.

The directional issues are the third problem

Work on one thing at a time.

Check for bad sensors or cracked hub ring

The brake booster/ naster cylinder is located on the firewall on the drivers side of the vehicle. The master cylinder has a resivour (sp) which has a cap and holds brake fluid. The brake booster is right behind that, the master cylinder is bolted right to the booster. The booster looks like a big circle about 10 to 12 inches round and usually 4 to 6 inches thick. It will have a vaccum hose coming off the booster and going to the intake manifold. The master cylinder with have hard lines coming off it which are brake lines. Hope this helps.

The BCM (body control module) is the problem, have it replaced, this is a common issue on your van.

sounds like your abs isnt working right. The pulling to the right could be the alignment out, brake pads more worn out on one side then the other or a rotor grabbing better than the other. If I was you I would get the alignment checked along with replacing brake pads and rotors and maybe disconnecting the abs, thats what I did to mine and have no problems anymore.