Wiper/washer System Ford Bronco II I

DESCRIPTION & OPERATION

Windshield wipers are actuated by a permanent magnet electric motor. The 2 wiper arms and blades are mounted on pivot shafts at each side of windshield.

Pivot shafts are connected to motor by linkage arms and attaching clips.

Both standard and interval wiper/washer systems feature a lever-type wiper/washer switch mounted on steering column. The circuit is protected by a separate 6-amp circuit breaker that is located at fuse block.

The Bronco II rear window wiper system consists of a motor mounted inside liftgate, an articulating arm and blade assembly, an instrument panel mounted control switch, and an in-line circuit breaker.

STANDARD SYSTEM

Switch has "OFF", "SLOW" and "FAST" positions. Switch can be in any position to operate washer.

INTERMITTENT SYSTEM

Wipe, low and high speed operation is same as standard wiper system. When wiper switch is in interval position, wipers make single swipes separated by a pause. The control knob on end of wiper control switch sets length of pause from 1-12 seconds.

To operate washer, pull control lever out. If lever is in "LO" or "HI" position, washers operate with no change in wiper operation. If wiper control switch is in "OFF" position, wipers will run as long as lever is pulled. When lever is released, washers will stop immediately but wipers will operate 1-4 cycles before returning to parked position.

WIPER MOTOR CURRENT DRAW

1. Disconnect battery negative cable. Disconnect linkage from motor. Disconnect electrical plug to test motor on vehicle. Connect negative lead from ammeter to battery positive post.
2. Connect positive lead first to low speed connection and then to high speed connection at connector plug. (Scheme 1) Motor current draw should not exceed 2.5 amps.

Scheme 1

CIRCUIT BREAKER

1. Before connecting circuit breaker to volt-amp tester, short leads together and adjust current draw until it equals circuit breaker rating. Connect breaker to ammeter. Leave breaker connected to tester for 10 minutes. Hold current reading on ammeter at rated current. If circuit breaker opens during 10 minutes, replace circuit breaker.
2. Short tester leads together and adjust current draw until it is twice rated current. Connect breaker. Hold current reading on ammeter at twice rated current. Circuit breaker should open and current drop to zero within 30 seconds.

SWITCH CONTINUITY

1. Check continuity between switch terminals. (Scheme 2) Either a self-powered test light or an ohmmeter can be used with standard system. An ohmmeter must be used with interval wiper system.
2. To detect marginal operation of switch, move switch lever while each reading is taken. If switch does not show continuity or shows poor continuity in any switch position, replace switch.

WIPER SWITCH CONTINUITY

Scheme 2

PARK TEST

1. Stop wiper blades with ignition switch so that wiper blades are not in park position. Connect jumper wires. (Scheme 3) Wiper should run not more than one full cycle and then park. If motor will not park or will not run to park position, replace motor.
2. If motor stops, check windshield wiper manual control switch and wiring for continuity. If switch and wiring are okay and wiper does not stop in off or interval setting, replace interval governor.

Scheme 3

WASHER PUMP CURRENT DRAW

Connect ammeter is series with washer pump. acceptable current draw is 1.7-4 amps while washer pump is running.

Removal

1. Disconnect battery negative cable. Remove wiper arm and blade assembly. Remove pivot shaft attaching nut, washer, and pivot block. Remove liftgate trim panel.
2. On Bronco II, remove motor bracket attaching screw and rectangular plate. Disconnect electrical connector and disengage wiring locator pins. Remove motor assembly.

Installation

Position motor in tailgate. On Bronco II, loosely install rectangular plate and attaching screw. DO NOT tighten screws at this time. On both models, install pivot block, washer and nut. Tighten motor bracket attaching screw. To complete installation, reverse removal procedure.

Removal (Bronco II & Ranger)

1. Turn wipers on until blades are straight up and turn ignition off to keep blades positioned up. Disconnect wiper motor wiring connector. Remove right wiper arm and blade. Disconnect battery negative cable. Remove right pivot nut and allow linkage to drop into cowl.
2. Remove linkage access cover. Reach through access cover opening and unsnap wiper motor clip. Push clip away from linkage until it clears nib on crank pin. Push clip off linkage. Remove wiper linkage from motor crank pin. Remove wiper motor attaching screws and remove motor.

To install, reverse removal procedure. Install clip to linkage first. DO NOT attempt to install linkage to motor crank pin and then install clip. Clip is properly installed if nib is protruding through center of clip.

Removal & Installation (Bronco II)

Disconnect battery negative cable. Remove headlight switch knob and bezel. Pull finish panel away from instrument panel and disconnect electrical connector. Remove screw attaching wiper switch to finish panel and remove. To install, reverse removal procedure.

Removal & Installation (Bronco II & Ranger)

Disconnect battery negative cable. Remove trim shrouds. Unplug electrical connector. Peel back foam sight shield. Remove 2 cross-recessed screws holding switch, and remove wiper/washer switch. To install, reverse removal procedure.

Removal & Installation

Disconnect battery negative cable. Remove steering column shroud. Unplug governor connector from wiper control switch. Unplug instrument panel wiring harness connector from governor. Remove mounting screws and governor. To install, reverse removal procedure.

Disconnect battery negative cable. Open glove box door and remove screw attaching circuit breaker to instrument panel. Disconnect circuit breaker from wiring. To install, reverse removal procedure.

Raise blade away from windshield and move slide latch away from pivot shaft. This unlocks wiper arm from pivot shaft and holds blade off of glass. Pull off wiper arm.

1. Ensure pivot shaft is in park position. Push main arm head over pivot shaft. Hold main arm head onto pivot shaft while raising blade end of wiper arm.
2. Push slide latch into lock under pivot shaft head. Lower blade to windshield. If blade does not touch windshield, slide latch is not completely in place.

1. Remove wiper arms. Slide right pivot shaft and linkage assembly out through right access opening.
2. Remove left wiper arm and blade. Remove left linkage access cover. Remove left pivot nut, lower linkage and slide out through left access opening.

Install clip completely on right linkage. Ensure clip is completely on. DO NOT put linkage on motor crank pin and then attempt to install clip. Slide left pivot shaft and linkage through access opening and position pivot shaft in place. Reinstall left wiper pivot shaft nut and linkage cover.

Remove right side quarter trim panel. Disconnect filler hose. Disconnect pump electrical connector. Remove screws attaching reservoir to quarter panel and remove. To install, reverse removal procedure.

1. Remove reservoir assembly from vehicle. Remove pump washer retaining ring. Using pliers, grip washer pump wall and pull out. Remove seal and impeller assembly. Clean reservoir.
2. To install washer pump, align small projection on motor end cap with slot in reservoir. Using a one inch, 12-point socket, hand press retaining ring against motor end plate. Install reservoir on vehicle.