Windshield wiper system — check and component removal and installation Ford F150
Wiper motor circuit check
Note: Refer to the wiring diagrams for wire colors in the following checks. When checking for voltage, probe a grounded 12-volt test light to each terminal at a connector until it lights; this verifies voltage (power) at the terminal. If the following checks fail to locate the problem, have the system diagnosed by a dealer service department or other properly equipped repair facility.
Note: There are some general voltage and ground tests that can be made to check the operation of the wiper system. To test it properly requires the use of a scanner with bi-directional capabilities. If the following outlined generic tests do not lead to a result, take your vehicle to the appropriate repair facility for diagnostics and repairs.
1. If the wipers work slowly, make sure the battery is in good condition and has a strong charge (see Engine electrical systems). If the battery is in good condition, remove the wiper motor and operate the wiper arms by hand. Check for binding linkage and pivots. Lubricate or repair the linkage or pivots as necessary. Reinstall the wiper motor. If the wipers still operate slowly, check for loose or corroded connections, especially the ground connection. If all connections look OK, replace the motor.
2. If the wipers fail to operate when activated, check the fuse (see Fuses and fusible links – general information). If the fuse is OK, connect a jumper wire between the wiper motor’s ground terminal and ground, then retest. If the motor works now, repair the ground connection. If the motor still doesn’t work, turn the wiper switch to the HI position and check for voltage at the motor.
3. If there’s voltage at the connector, remove the motor and check it off the vehicle with fused jumper wires from the battery. If the motor now works, check for binding linkage (see Step 1). If the motor still doesn’t work, replace it. If there’s no voltage to the motor, check for voltage at the wiper control relays. If there’s voltage at the wiper control relays and no voltage at the wiper motor, have the switch tested. If the switch is OK, the wiper control relay is probably bad. See Relays – general information and testing for relay testing.
4. If the interval (delay) function is inoperative, check the continuity of all the wiring between the switch and wiper control module.
5. If the wipers stop at the position they’re in when the switch is turned off (fail to park), check for voltage at the park feed wire of the wiper motor connector when the wiper switch is Off but the ignition is On. If no voltage is present, check for an open circuit between the wiper motor and the fuse panel.
Wiper motor replacement
6. Operate the wipers to allow the wiper blades to return to the park position, then disconnect the cable from the negative battery terminal (see Engine electrical systems).
7. Mark the positions of the wiper arm(s) on the windshield, then remove the wiper arm(s) (see illustration).
.7 Release the wiper locking tab using a small screwdriver or pick and pull the wiper arm off the wiper motor shaft
8. Remove the cowl cover (see Body).
9. Disconnect the wiper motor wiring harness connector and remove the three bolts securing the windshield wiper transmission assembly to the vehicle and remove the assembly (see illustration).
.9 Wiper transmission assembly mounting bolts
10. Mark the location of the wiper crank arm to the transmission linkage assembly and wiper motor shaft. Remove the wiper motor crank arm nut and separate the crank arm from the motor (see illustration).
.10 Crank arm nut and match marks
A. Crank arm nut
B. Match mark the crank arm to the wiper motor shaft and to the bracket before removing the crank arm
11. Remove the fasteners securing the motor to the linkage assembly (see illustration).
.11 Remove the fasteners
12. Installation is the reverse of removal. Tighten all fasteners to the torque settings listed Section
Rain sensor — removal and installation
13. Remove the interior rear view mirror.
14. Disconnect the rain sensor electrical connection.
15. Release the retainers.
16. Remove the rain sensor.
17. Installation is the reverse of removal.
Windshield washer reservoir and washer pump — removal and installation
18. Drain any washer fluid from the washer reservoir either by disconnecting the washer hose or siphoning out the fluid.
19. Remove the right hand inner fender liner.
20. Disconnect the washer pump electrical connections and washer hose.
Note: Some washer fluid can escape during the next process. Have a drain pan under the washer bottle to collect any remaining washer fluid.
21. The washer pump can now be removed by grasping the pump and pulling it straight out of the washer reservoir grommet.
22. Remove the battery tray from the engine compartment.
23. Locate the push pin and single bolt (with large fender washer) that secure the reservoir to the vehicle. Remove the push pin and bolt.
24. Lift the washer reservoir from the vehicle.
25. Installation is the reverse of removal.