How do you adjust parking brake on 03 ford E350 van?

To adjust the parking brake on a 2003 Ford E350 van, start by ensuring the vehicle is on a level surface and the wheels are chocked. Locate the parking brake adjustment mechanism, typically found under the vehicle near the rear axle, and turn the adjustment nut to increase or decrease tension on the brake cables. After adjustments, test the parking brake by engaging it and ensuring it holds the vehicle securely. If necessary, repeat the adjustment process until the desired tension is achieved.