To check the wiper motor circuit, begin by examining the wiring diagrams for wire colors and locations. For voltage verification, use a grounded 12-volt test light on each terminal at a connector until it lights. If wipers operate slowly, ensure the battery is in good condition and fully charged; if so, remove the wiper motor and manually operate the wiper arms to check for binding in the linkage and pivots, lubricating or repairing as needed before reinstalling the motor. If slow operation persists, inspect for loose or corroded connections, particularly the ground, and replace the motor if connections are satisfactory. If wipers do not activate, check the
Fuse in the driver's side interior fuse panel; if intact, connect a jumper wire between the wiper motor's ground terminal and ground, then retest. If the motor operates, repair the ground connection; if not, check for voltage at the motor with the wiper switch in the HI position, noting that the cowl cover must be removed to access the electrical connector. If voltage is present, remove the motor and test it off the vehicle with fused jumper wires from the battery; if it works, check for binding linkage. If it does not work, replace the motor. If there is no voltage to the motor, check for voltage at the wiper control relays; if voltage is present at the relays but not at the motor, test the switch, and if the switch is functional, the wiper control relay may be faulty. For inoperative interval function, check the continuity of wiring between the switch and wiper control module. If wipers fail to park when the switch is turned off, check for voltage at the park feed wire of the wiper motor connector with the switch OFF and ignition ON; if absent, inspect for an open circuit between the wiper motor and fuse panel. For replacement, disconnect the negative battery cable, remove covers over the wiper arm mounting nuts, and mark the relationship of the arms to the spindles before prying them up. Remove the cowl louver panels, disconnect the wiper motor harness connector, and take out the mounting bolts for the windshield wiper motor/linkage assembly. Slide the assembly toward the passenger side to detach the rubber pin near the motor from the cowl sheet metal, then lift the assembly from the cowl area. Pry the linkage from the motor arm, remove the wiper motor mounting bolts, and separate the motor from the frame. Installation follows the reverse order of removal.