Wipers and Washers Land Rover Discovery L318

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Reservoir with headlamp power wash shown

Scheme 5

General

All markets have a common wiper system with headlamp powerwash as an option.

The wipers system comprises two front wipers and one rear wiper which are powered by electric motors. A washer reservoir is located in the front left hand wheel arch and is fitted with two electric pumps. Each pump supplies washer fluid to either the front or rear screens. On certain models, a third pump can be fitted to operate a headlamp power wash function. Operation of the front and rear wipers and washers is controlled by the driver using switches located on a steering column stalk and push button switches on the fascia.

Control of the wipers and washers is achieved by the following components

1. BCU.
2. IDM.
3. Front wiper relay.
4. Front wash/ wipe switch.
5. Variable delay switch.
6. Front wiper motor assembly.
7. Front washer pump motor.
8. Rear wiper relay.
9. Rear wiper switch.
10. Rear washer switch.
11. Rear wiper motor.
12. Rear washer pump motor.

Both the Body Control Unit (BCU) and the Intelligent Driver Module (IDM) control the wiper system. The BCU controls the time delay function of the wiper system and is located below and behind the passenger glovebox. During engine cranking the BCU prevents wiper functions. Two relays are located in the passenger compartment fusebox. The relays control the delay operation of the front and rear wipers. The relays are an integral part of the fusebox and cannot be renewed separately.

Power for the wiper system is supplied by the IDM, which is integral with the passenger fusebox and cannot be renewed as a component. A serial communication link allows communication between the IDM and the BCU.

The system has diagnostic capabilities through TestBook.

Front wipers

The two front windscreen wipers are operated by a linkage assembly and an electric motor located under the plenum grill below the windscreen. The linkage and motor assembly is handed for left and right hand drive vehicles. The motor is an integral part of the linkage and cannot be replaced separately.

The linkage comprises a pressed steel mounting plate which provides for the attachment of a wheel box at each end. The mounting plate is secured to the bulkhead with flanged nuts which attach to a stud plate located behind the bulkhead. A link arm is attached to each wheel box by a short link and secured with circlips. The link arm has an attachment hole centrally located along its length for the electric motor drive link.

The electric motor is mounted in a recess in the bulkhead below a sealed cover plate. The drive spindle of the motor protrudes through the cover plate and is fitted with a link. The link is attached to a tapered spline on the motor spindle and is secured with a lock washer and nut. The opposite end of the link is attached to the central attachment point on the link arm and secured with a circlip.

Each wheel box has a taper splined shaft which allows for the attachment of the wiper arm which is secured with a washer and nut. The shaft of each wheel box is passed through a rubber sealed aperture in the plenum. The wiper arm attachment to the splined shaft has a pivot to which the remainder of the arm is attached. The two parts of the arm are connected by a spring which controls the pressure of the blade on the screen to a predetermined amount.

The wiper blades are attached to the wiper arms with a clips that allow the blade to pivot. Each wiper blade comprises a number of levers and yokes to which the rubber wiper is attached. The levers and yokes ensure that the pressure applied by the arm spring is distributed evenly along the full length of the blade. The rubber wiper is held in the yokes by a pair of stainless steel strips which also contribute to the even distribution of spring pressure along the blade. The driver's side wiper blade is fitted with an aerofoil which presses the blade onto the screen at high speed. This prevents the blade from lifting off the screen and maintains the wiping performance.

Scheme 6

The front wash/ wipe switch is located on a stalk on the RH side of the steering column and allows the driver to control the operation of the front wipers and the front washer pump.

Operating the washer switch provides battery voltage from fuse 19 in the passenger compartment fusebox to the washer pump motor.

Operating the flick wipe function provides battery voltage from fuse 19 in the passenger compartment fuse box to the high-speed brushes of the wiper motor.

Operating the intermittent function provides a battery voltage signal to the BCU. The BCU determines the wipe interval from the variable delay switch and signals the IDM to activate the front wiper relay, which provides battery voltage to the wiper motor.

Operating the low-speed function provides battery voltage from fuse 19 in the passenger compartment fuse box to the low-speed brushes of the wiper motor.

Operating the high-speed function provides battery voltage from fuse 19 in the passenger compartment fuse box to the high-speed brushes of the wiper motor

Scheme 7

A rotary type variable delay switch, integral with the front wash/ wipe switch, controls the interval between windscreen wipes for intermittent wipe variable delay operation.

The variable delay switch is integral with the front wash/ wipe switch.

The input from the front variable delay switch to the BCU ranges from battery voltage to zero Volts.

The resistance values and associated time intervals of the variable delay switch are shown in the following table

FRONT VARIABLE DELAY SWITCH

TestBook has the ability to monitor the timer function within the BCU from which it can determine the position of the variable delay switch.

Scheme 8

The front wiper motor assembly is located on the bulkhead beneath the plenum.

The dc motor contains two permanent magnets, three brushes and a park switch. The smaller third brush is utilized for high-speed operation. Attached to the brush pack are 3 capacitors, which minimize radio interference during wiper operation. A thermal trip switch attached to the brush plate prevents thermal overload of the motor.

The motor incorporates a worm drive gear unit to transfer the rotary motion into a linear motion of the wiper linkage assembly.

The front wiper motor receives battery voltage from fuse 19 of the passenger compartment fuse box. For low-speed operation, including intermittent variable delay operation, the battery voltage to move the wiper motor from the park position passes through the front wiper relay. When the park switch moves to the closed when operating position, fuse 19 of the passenger compartment fuse box provides battery voltage directly to the wiper motor.

For high-speed operation, including flick wipe, fuse 19 in the passenger compartment fuse box provides the battery voltage to move the wiper motor from the park position through the front wash/ wipe switch to the front wiper motor. To achieve high-speed wiper operation, power is supplied to a third brush that provides a closer distance between the motor poles. Because the poles of the motor are closer together, the motor operates faster.

Rear wiper

The rear wiper is driven directly from an electric motor located inside the tail door. The motor is mounted inside the tail door with two bolts, lock washers and washers. The motor mounting brackets have rubber inserts to prevent motor operating noise being transferred to the door structure. The motor spindle is fitted with a seal and protrudes through a hole in the tail door outer skin panel. The motor spindle is secured to the tail door with a washer and nut.

The motor output spindle has a taper splined shaft which allows for the attachment of the wiper arm which is secured with a nut. The wiper arm attachment to the splined shaft has a pivot to which the remainder of the arm is attached. The two parts of the arm are connected by a spring which controls the pressure of the blade on the window to a predetermined amount.

The wiper blade is attached to the wiper arms with a clip which allows the blade to pivot. The wiper blade comprises of a number of levers and yokes to which the rubber wiper is attached. The levers and yokes ensure that the pressure applied by the arm spring is evenly distributed along the full length of the blade. The rubber wiper is held in the yokes by a pair of stainless steel strips which also contribute to the even distribution of spring pressure along the blade.

Scheme 9

The rear wiper switch is a latching pushbutton switch and is located on the right hand side of the instrument pack.

Activating the rear wiper switch provides an earth signal to the BCU. The BCU signals the IDM to energize the rear wiper relay, which provides battery voltage to the rear wiper motor.

Scheme 10

The DC motor contains two permanent magnets and a park switch. An earth braid attached between the motor casing and the brush pack is utilized to minimize radio interference during wiper functions.

The rear wiper switch provides an earth signal to the BCU, which determines the delay interval, if appropriate. The BCU then signals the IDM to activate the rear wiper motor relay, which provides power to the rear wiper motor.

To allow the rear wiper to park when the rear wiper is switched off, power flows through the park switch until a cam in the wiper motor assembly breaks the contact of the park switch. Triggering the park switch grounds the positive side of the wiper motor causing it to stop abruptly

The washer system comprises a reservoir, washer pumps, hoses and washer jets. The front washers are controlled from a stalk switch on the steering column and the rear washers are operated by a non-latching pushbutton switch on the fascia adjacent to the instrument pack.

Reservoir

The reservoir is located behind the front bumper in the inner wheel arch and has a capacity of 6.0 liters (12.5 US pints). A filler neck tube is connected to the reservoir with a seal and extends into the engine compartment on the front left hand side. The filler neck tube contains a removable filter to prevent particle contamination and a yellow float to show reservoir contents. The washer filler neck tube is sealed with a cap which is colored blue for identification.

Two electric washer pumps are located on the rear face of the reservoir and supply washer fluid to the front windscreen and the tail door window. Each pump is sealed to the reservoir with a rubber sealing grommet.

On vehicles with headlamp powerwash fitted, a third pump is fitted with a sealing grommet to the front face of the reservoir.

The reservoir and filler neck tube are manufactured from molded opaque nylon. The reservoir has molded lugs for attachment to the vehicle body. A bracket is attached to the top of the filler neck tube and locates in a hole in the body to secure the top of the tube.

Front screen washer jets

Two washer jets for the front windscreen are fitted to the top surface of the bonnet and held in place with plastic clips. Each washer jet is connected via a hose to an in-line valve. The in-line valve prevents the washer fluid draining back to the reservoir and ensures that the washers operate immediately the washer pump is operated. From each in-line valve the washers are connected via a short hose to a 'T' connector. From the 'T' connector a single hose connects to the outlet of the front washer pump. Each jet has two jets which can be adjusted to allow full fluid coverage of the windscreen.

Rear screen washer jet

A single washer jet for the tail door window is fitted to the rear wiper blade. The jet has four spray orifices which direct washer fluid to either side and along the length of the wiper blade. The jet is connected by a hose from the wiper blade, through a sealing grommet in the tail door and connects with the rear washer hose from the rear washer pump. A non-return valve is used to join the feed hose from the pump to the washer jet hose. The non-return valve prevents fluid draining to the reservoir and ensures that the washer operates immediately the washer pump is operated. The hose from the pump to the tail door is located inside the main harness.

Headlamp power washer jets

When fitted, a powerwash jet for each headlamp is located in a housing on the top surface of the front bumper. The jets are fed with fluid at high pressure from the powerwash pump. A large diameter hose connects each jet to the pump. Each connection is secured with a metal clip to secure the hose due to the high pressure from the pump. Each jet directs the high pressure fluid in a wide spray onto the headlamp lens.

Scheme 11

The rear washer switch is a non-latching pushbutton switch and is located on the RH side of the instrument pack.

Activating the rear washer switch provides battery voltage from fuse 30 in the passenger compartment fusebox to the rear washer pump.

Scheme 12

The front washer pump consists of a DC motor with an impeller. It is located in the rear of the washer fluid reservoir and can be identified by its black top.

Operating the front washer switch provides battery voltage to the front washer pump. This same battery voltage signal also goes to the BCU and increments the headlamp powerwash counter providing the headlamps are switched on.

Scheme 13

The rear washer pump consists of a DC motor with an impeller. It is located in the rear of the washer fluid reservoir and can be identified by its red top.

Operating the rear washer switch provides battery voltage to the rear washer pump.

Scheme 14

The headlamp power wash pump consists of a DC motor with an impeller. It is located on the front of the washer fluid reservoir.

The BCU controls operation of the headlamp power wash relay, which supplies battery voltage from fuse 4 located in the engine compartment fuse box to the headlamp power wash pump. When the BCU determines headlamp power wash is to be activated, it provides a ground path for the coil of the headlamp power wash relay. The auxiliary relay located in the engine compartment fuse box supplies the headlamp power wash relay coil with battery voltage.

Front intermittent wipe variable delay

The front intermittent wipe variable delay operation allows the driver to adjust the interval between wipes to suit local conditions. Front variable delay operation activates when the following conditions are met

1. Ignition switch in position I or II.
2. Front wash/ wipe switch is in the intermittent position.

The BCU receives the front intermittent wipe signal from the front wash/ wipe switch. The BCU receives a separate signal from the variable delay switch, determines the delay interval from the front wash/ wipe switch position and passes it on to the IDM. The IDM energizes the front wiper relay to activate the front wiper motor.

If the delay duration is decreased during front variable delay operation, the wipers immediately operate once and then the delay cycle is reset to the new duration.

If the delay duration is increased during front variable delay operation, the delay cycle is automatically increased by the BCU.

Front low speed

Front low-speed operation activates when the following conditions are met

1. Ignition switch is in position I or II.
2. Front wipe/ wash switch is in low speed position.

Selecting low-speed on the front wash/ wipe switch signals the IDM to energizes the front wiper relay, which provides power to the front wiper motor assembly.

Front high speed

Front high-speed operation activates when the following conditions are met

1. Ignition switch is in position I or II.
2. Front wipe/ wash switch is in high speed position.

Selecting high speed on the front wash/ wipe switch allows power to flow from the switch directly to the wiper motor. The high-speed input goes to a set of brushes in the wiper motor that are closer together than the low speed brushes. These brushes allow the motor to run at a faster speed but with less torque.

Front washer

Front washer operation will only activate when the following conditions are met

1. Ignition switch is in position I or II.
2. Front washer switch operated.

Flicking the front washer switch energizes the front washer pump motor for 0.4 second. Holding the front washer switch for longer than 0.4 second allows the front washer pump motor to run as long as the switch is held.

There are two front washer configurations. If the vehicle is fitted with program wash/ wipe, and the front washer pump motor is active for more than 0.5 second, the front wipers operate at low speed. The wipers continue to operate for 4 seconds after the washer switch is released. In some markets, the driver must activate the front wipers after a front washer operation.

The front washer operation has a higher priority than the variable delay operation. This means that if intermittent wipe is active when a front washer operation is initiated, the wash cycle executes and the intermittent wipe is re-instated at the end of the wash operation.

Front flick wipe

Flick wipe operation will only activate when the following conditions are met

1. Ignition switch is in position I or II.
2. Front flick switch is operated.

Pressing the flick wipe switch operates the front wiper motor at high speed. The front wiper motor operates as long as the flick switch is activated. Releasing the flick switch causes the front wiper motor to run through the park switch circuitry. The park switch only permits low speed operation. Thus if the flick switch is pressed and immediately released, the wipers operate at low speed.

Rear intermittent wipe variable delay

The rear intermittent wipe variable delay operation allows the driver to adjust the interval between wipes to suit local conditions. Rear variable delay operation only activates if the following conditions are met

1. Ignition switch in position I or II.
2. Front wash/ wipe switch on intermittent.
3. Rear wipe switch is operated.

The BCU determines the desired delay interval based on the setting of the variable delay switch. The rear wash/ wipe delay is nominally twice as long as that of the front. This information passes from the IDM to the rear wiper relay and activates the rear wiper motor.

If the delay duration is decreased during operation of the rear wiper, the wipers immediately operate once and the delay cycle is reset.

If the delay duration is increased during operation of the rear wiper, the delay cycle is automatically increased by the BCU.

Reverse wiping

Reverse wiping operates the rear wiper motor when reverse gear is selected. The transmission must be in reverse for longer then 0.5 seconds before reversing wipe activates. Reversing wipe activates if the following conditions are met

1. Ignition switch is in position II.
2. Reverse gear is selected.
3. Rear wiper or front wipers operating.

If the rear wiper is active in any mode when reverse gear is selected, the rear wiper activates for 4 second. After 4 seconds the rear wiper operates in a delay operation at the same delay interval set by the variable delay switch until reverse gear is deselected.

If the front wipers are operating on either low or high speed when reverse gear is selected, the rear wiper activates continuously until reverse gear is deselected.

In order to enable reversing wipe functions, the BCU utilizes the reversing light switch located within the transmission to determine when reverse gear has been selected.

If the front intermittent wipe is active when reverse gear is selected, the rear wiper completes 2 cycles before operating at the same intermittent delay as the front wipers.

Rear wipe

Rear wipe operation will only activate when the following conditions are met

1. Ignition switch is in position II.
2. Rear wipe switch is operated.

Operating the rear wiper switch provides an earth input to the BCU. The BCU tells the IDM to activate the rear wiper relay, which provides battery voltage to the wiper motor through the normally closed contacts of the park switch.

Rear wash

Rear wash will only operate when the following conditions are met

1. Ignition switch is in position II.
2. Rear wash switch operated.

Operating the rear washer switch for longer than 0.4 second allows the rear washer pump motor and rear wipers to run as long as the switch is held. The wipers run for 4 seconds after the rear washer switch is released. Flicking the rear washer switch energizes the rear washer pump motor for 0.4 second.

The rear washer operation has a higher priority than the intermittent wipe operation. If the intermittent wipe is active when a rear washer operation is initiated, the wash cycle executes and the intermittent wipe is re-instated at the end of the washer operation.

Wiper park switch

The park switch allows the wipers to come to rest in the park position when the wipe switch is turned off in mid-wipe.

The park switch consists of a positive and a negative contact. These two contacts are described as closed at park and closed when operating. When the wipers first start, the park switch is in the closed at park position. A relay controls battery voltage to the motor. Battery voltage passes through this relay contact to move the wiper motor from the park position.

When the motor moves, the park switch moves to the closed when operating position. Battery voltage to this relay contact is direct from fuse 19. Battery voltage passes through this contact to keep the wiper motor running. The wiper motor operates for one complete revolution until the park switch moves to the closed at park position again.

Switching off the wipers removes battery voltage from the closed at park contact. When the wipers reach the closed at park switch an earth is applied and the motor stops abruptly.

Headlamp power wash

Headlamp power wash activates when the following conditions are met

1. Ignition switch in position II.
2. Headlamps switched on.
3. Front wash switch operated.
4. BCU counter allows headlamp power wash.

Operating the front washer switch with the headlamps switched on energizes the IDM, supplying a voltage to the headlamp powerwash relay, which operates the headlamp powerwash pump and increments a counter within the BCU. This counter prevents the headlamp powerwash pump from operating every time the front washer switch is activated. Headlamp powerwash is only operational every third front wash cycle, providing the headlamps are on. The counter resets when the ignition switch is turned off.

When the BCU permits headlamp power wash operation, the pump motor operates only for 0.5 second.

Scheme 15

1. Remove front grille. Refer to «REMOVE»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
2. Remove front bumper assembly. Refer to «REMOVE»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
3. Disconnect multiplug from headlamp washer pump.
4. Identify multiplugs for refit and disconnect from rear screen and windscreen washer pumps.
5. Identify hoses for refit and disconnect hoses from rear screen and windscreen washer pumps.
6. Release clip securing washer hose to headlamp washer pump.
7. Remove 2 nuts and 1 bolt securing reservoir, release reservoir from filler neck and remove reservoir assembly.
8. Remove filler neck grommet. NOTE: Do not carry out further dismantling if component is removed for access only.
9. Remove fluid level indicator.
10. Remove washer pumps from reservoir, remove and discard pump seals.

Refit

1. Use new seals and fit washer pumps to new reservoir.
2. Fit filler neck grommet to reservoir.
3. Fit level indicator into filler neck.
4. Fit reservoir assembly and secure with nuts and bolt.
5. Connect hoses to rear screen pump, windscreen washer pump and headlamp washer pump. Secure hoses with clips.
6. Identify and connect multiplugs to washer pumps.
7. Fit front bumper assembly. Refer to «REFIT»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
8. Fit front grille. Refer to «REFIT»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
9. Refill reservoir

Scheme 16

Scheme 17

1. Remove the front bumper assembly. Refer to «REMOVE»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
2. Disconnect multiplug from the headlamp washer pump.
3. Place a container beneath vehicle to collect any spillage.
4. Noting fitted position disconnect multiplugs and washer hoses from the front and rear windscreen washer pumps.
5. Remove 2 nuts and 2 bolts securing the washer reservoir to the body.
6. Release washer reservoir from filler neck. Remove the washer reservoir.
7. Remove and discard the washer reservoir filler neck seal. NOTE: Do not carry out further dismantling if component is removed for access only.
8. Remove washer pumps from washer reservoir and discard the seals.

1. Clean washer pump and filler neck seal recesses.
2. Fit new washer pump and filler neck seals to the washer reservoir.
3. Fit and secure washer pumps to the washer reservoir.
4. Fit washer reservoir to the filler neck, fit and tighten the nuts and bolts.
5. Connect multiplugs and washer hoses to the windscreen washer pumps.
6. Remove container from beneath the vehicle.
7. Fit the front bumper assembly.

Refer to REFIT .

Remove

1. Carefully pull the elbow from the washer jet.
2. Place a protective covering around the washer jet, then release and remove washer jet.

1. Fit washer jet to its location in the bonnet, and remove the protective material.
2. Connect the washer tube, ensuring that it is pushed fully onto the stub pipe.

84.10.21 Pump - washer - screen and headlamp

The following procedure also covers removal of the rear screen washer pump and the headlamp washer pump.

Scheme 18

Scheme 19

1. Headlamp washer pump: Remove front bumper. Refer to «REMOVE»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
2. Front and rear screen washer pumps: Remove 7 screws securing LH front wheel arch liner extension to liner and bumper valance and remove liner extension.
3. Position container under washer reservoir to collect fluid spillage.
4. Disconnect multiplug from washer pump.
5. Release clip and disconnect washer hose from washer pump.
6. Remove washer pump from reservoir and remove and discard pump seal.

1. Use a new seal and fit pump to reservoir.
2. Connect hose to pump and secure with clip.
3. Connect multiplug to pump.
4. Front and rear screen washer pumps: Fit wheel arch liner extension, secure to bumper valance and liner with screws.
5. Headlamp washer pump: Fit front bumper. Refer to «REFIT»(/land-rover/discovery/l318-2002-2004/remont/mirrors/#exterior-fittings) .
6. Fill reservoir with washer fluid.

Scheme 20

Scheme 21

Scheme 22

1. Remove plenum air intake.
2. Remove 4 nuts and one bolt securing motor mounting plate to body.
3. Remove nut and bolt securing linkage to body.
4. Release motor and linkage from body and disconnect multiplug from windscreen wiper motor.
5. Remove motor and linkage.
6. Remove nut securing linkage connecting rod to wiper motor spindle.
7. Release link from motor spindle.
8. Remove 3 bolts securing motor to mounting plate and remove motor.

1. Fit new wiper motor to mounting plate and secure with bolts.
2. Connect link to motor spindle and tighten nut to 7 Nm (5.2 lbf.ft).
3. Fit motor and linkage to body, connect multiplug. Tighten all fixings to 2.5 Nm (1.8 lbf.ft).
4. Fit plenum air intake.

84.15.34 Switch - wiper and washer - windscreen

Scheme 23

1. Remove rotary coupler. Refer to «REMOVAL»(/land-rover/discovery/l318-2002-2004/remont/manual-power-steering/#steering-system) .
2. Release passive coil from steering column lock and lower the coil without disconnecting the harness.
3. Release front wiper delay multiplug from column switch mounting bracket and disconnect from harness.
4. Disconnect harness multiplug from wiper switch.
5. Remove 2 screws securing switch, carefully raise edge of switch bracket to clear location peg and remove switch.

1. Fit new switch to bracket and secure with screws.
2. Connect harness multiplug to switch.
3. Connect front wiper delay multiplug and fit multiplug to switch bracket.
4. Fit passive coil to column lock.
5. Fit rotary coupler.

Refer to INSTALLATION .

84.20.08 Jet - washer - headlamp

The procedure to remove the headlamp washer jet on 03MY vehicles is detailed in the front bumper finisher job.

Refer to REMOVE .

1. Remove retaining screw cover from jet housing.
2. Remove screw securing jet to bumper.
3. Release jet and withdraw sufficiently to gain access to washer tube. Disconnect tube from jet and remove jet.

1. Connect jet to washer tube, ensuring it is pushed fully home.
2. Locate jet in bumper, retain with screw and fit screw cover.

Scheme 24

1. Remove spare wheel.
2. Remove rear screen wiper blade.
3. Release washer jet and washer jet tube from wiper arm.
4. Release washer jet from washer jet tube and remove jet.

1. Fit new washer jet to washer jet tube and fit to wiper arm.
2. Fit rear screen wiper blade.
3. Fit spare wheel.

Scheme 25

1. Carefully remove switch from instrument cowl.
2. Disconnect multiplug and remove switch.

1. Position new switch and connect multiplug.
2. Carefully push switch into instrument cowl.

Scheme 26

1. Remove spare wheel from tail door.
2. Remove tail door trim casing. Refer to «REMOVE»(/land-rover/discovery/l318-2002-2004/remont/exterior-body-panels/#doors) .
3. Remove tail door water shedder.
4. Disconnect washer tube
5. Raise nut cover, remove nut and release wiper arm.
6. Remove spindle nut and flat washer and discard rubber seal.
7. Disconnect tail door harness multiplug from wiper motor.
8. Remove 2 bolts securing wiper motor to tail door.
9. Remove wiper motor.

1. Position wiper motor to door and secure with bolts.
2. Connect tail door harness multiplug to wiper motor.
3. Fit rubber seal, flat washer and spindle nut. Tighten spindle nut to 3 Nm (2.2 lbf.ft).
4. Position wiper arm to tail door and connect washer tube.
5. Tighten wiper arm nut to 12 Nm (9 lbf.ft) and fit nut cover.
6. Fit tail door water shedder.
7. Fit tail door trim casing. Refer to «REFIT»(/land-rover/discovery/l318-2002-2004/remont/exterior-body-panels/#doors) .
8. Fit spare wheel to tail door.

Scheme 27

1. Carefully remove switch from instrument cowl.
2. Disconnect multiplug and remove switch.

1. Position new switch and connect multiplug.
2. Carefully push switch into instrument cowl.

Scheme 28

Scheme 29

1. Remove 2 screws securing instrument cowl to fascia and release the cowl from the retaining clips.
2. Disconnect multiplug from the rear wiper switch.
3. Remove the rear wiper switch from the instrument cowl.

1. Fit and secure the rear wiper switch to the instrument cowl and connect the multiplug.
2. Fit the instrument cowl to the fascia and secure with screws.

See also:
• REMOVE
• REMOVAL
• REMOVE