Wipers are one of the most common parts on a vehicle taken for granted. Most drivers get the wiper blades changed occasionally while their car is in for an oil change. Hardly anyone thinks about the wiper motors, which typically are very reliable. However, when a wiper motor does fail, it can be a pain. Getting caught in a rain or snowstorm without operational wiper blades isn't just inconvenient, it's dangerous and against the law in many areas. While you could get a mechanic to perform this repair for you, replacing the wiper motor in any Ford Focus can be done by just about anyone.
Disconnect the negative battery cable.
Open the bonnet and use the prop rod to hold it open.
Lift up the plastic cap at the base of the wiper arm. Using a ratchet, loosen the nut on the base of the wiper arm one or two turns.
Lift the wiper arm and move it side to side gently to help release it. Once it feels loose, remove the nut completely.
Locate the caps in the cowl grille at the base of the windshield. The cowl grille is the black, pivoted plastic piece that you can see between the windshield and the hood with the hood closed.
Pry the caps up and detach the screws below the caps, starting on the passenger's side. Remove the cowl grille once you have loosened it completely.
Locate the small black clip near where the retaining caps and screws were removed. Remove the clip and move it off to the side. Disconnect the wiper motor plug in the same vicinity.
Locate the three bolts securing the wiper motor and its linkage to the firewall and unscrew them. This loosens the assembly, so be sure to hold onto the motor and linkage. Remove the assembly from the Focus.
Unscrew the motor from the linkage by locating the three screws on the opposite side of the wiper motor and removing them.
Always disconnect the battery when working with anything dealing with a vehicle's electrical system.