Depending on the exact model, you may have a few things to remove in front of it. When front is clear then remove the brake master cylinder then the booster. A lot of awkward wrench work can be made easier if you have a good socket set with universal joints.
Unless the caliper is broken, you can just replace the brake pads.
If you remove the right front plastic fender liner on the caravan, the water pump is lower right of the engine.
The 2002 Dodge Grand-Caravan has 39.6 in. of front head room.
The 2002 Dodge Grand-Caravan has 40.6 in. of front leg room.
The 2002 Dodge Grand-Caravan has 62.9 in. of front shoulder room.
The 2014 Dodge Grand-Caravan has 58.4 in. of front hip room.
The 2001 Dodge Grand-Caravan has 39.6 in. of front head room.
The 2001 Dodge Grand-Caravan has 57.2 in. of front hip room.
The 2002 Dodge Grand-Caravan has 57.2 in. of front hip room.
The 2012 Dodge Grand-Caravan has 58.4 in. of front hip room.
The 2013 Dodge Grand-Caravan has 58.4 in. of front hip room.