To remove wiper arms firstly remove the cover (if available) by lifting or prising it off, and then slacken the nut at the base of the wiper arm. Press the front wiper arms down and gently tap them to break the bond between the arm and spindle using tape to allow protection of the arm. Is a rocking motion is used to pull the arms off the splines, and when necessary, a puller may be used to remove the arms. For the tailgate wiper, fold up the cover and undo the nut that is holding the arm in place on the spindle, to pull the arm back from the spindle using a rocking motion. For refitting, the appropriate wiper is turned on and off so that the motor and linkage are parked. Have you placed the windscreen wiper arms with the middle or wiper blade 50 mm from the top edge of the cowl panel and the tailgate wiper arm in the middle of the black area of the bottom of the screen.