Under Wisconsin Commercial Driver Manual Section 5, how do you test the service brakes during a pre-trip inspection (the static service brake test)?

1. Drive at 25 mph and slam on the brakes
2. With the parking brake released, allow the vehicle to move forward slowly at about 5 mph, then apply the foot brake firmly — the vehicle should stop and you should not feel any pull to one side
3. Apply the parking brake at high speed
4. Drain the air tanks first