MERCEDES-BENZ SPRINTER 2005 Service Repair Manual

WASHERS/FRONT WIPER MOTOR -
INSTALLATION).
(2) Carefully position the wiper linkage module
and wiper motor to the underside of the cowl top
panel as a unit (Fig. 22).
(3) Install and tighten the two screws that secure
the wiper linkage module motor bracket to the flange
on the underside of the cowl top panel. Tighten the
screws to 6 N´m (50 in. lbs.).
(4) Install and tighten the nut and washer that
secures each wiper pivot housing to the outside of the
cowl top panel.
(5) Reconnect the wiper motor pigtail wire connec-
tor to the vehicle wire harness connector.
(6) Reinstall the ventilation housing onto the dash
panel and the underside of the cowl top panel (Fig.
21).
(7) Reinstall the wiper arms onto the wiper pivots.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARM - INSTALLATION).
(8) Reconnect the battery negative cable.
WIPER MOTOR
DESCRIPTION
The wiper motor is secured with three screws to a
motor bracket integral to the wiper linkage module
bracket located below the cowl top panel in the
engine compartment (Fig. 23). The wiper motor out-
put shaft passes through a hole in the motor bracket,
where a nut secures the wiper motor crank arm to
the motor output shaft. The two-speed permanent
magnet wiper motor features an integral transmis-sion, an internal park switch, and an internal Posi-
tive Temperature Coefficient (PTC) circuit breaker.
The wiper motor cannot be adjusted or repaired. If
any component of the motor is faulty or damaged, the
entire wiper motor unit must be replaced.
OPERATION
The wiper motor operation is controlled by the
vehicle operator through battery current inputs
received by the wiper motor from the wiper switch
circuitry of the multi-function switch on the top of
the steering column, and from the wiper relay on the
fuse block underneath the steering column. The
wiper motor speed is controlled by current flow to
either the low speed or the high speed set of brushes.
The automatic resetting circuit breaker protects the
motor from overloads.
The park switch consists of a contact disc and
three contacts. The contact disc is mechanically fas-
tened to and rotated with a gear in the wiper motor
transmission. Two input contacts alternately close
the wiper park switch sense output circuit contact to
ground or to battery current, depending upon the
position of the wipers on the glass. This feature
allows the intermittent wipe logic circuit to monitor
the position and the cycles of the wiper motor to pro-
vide the intermittent wipe and wipe-after-wash
modes, as well as allowing the motor to complete its
current wipe cycle after the wiper system has been
turned Off and park the wiper blades in the lowest
portion of the wipe pattern.
The wiper motor may be diagnosed using conven-
tional diagnostic tools and methods.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Disconnect the vehicle wire harness connector
for the wiper motor from the motor pigtail wire con-
nector (Fig. 24).
(3) Remove the nut that secures the motor crank
arm to the wiper motor output shaft.
(4) If this wiper motor is to be reinstalled, make
an index mark between the wiper motor output shaft
and the motor crank arm using a suitable marker.
(5) Disengage the motor crank arm from the wiper
motor output shaft.
(6) Remove the three screws that secure the wiper
motor to the wiper linkage module motor bracket.
(7) Remove the wiper motor from the wiper link-
age module motor bracket.
INSTALLATION
(1) Position the wiper motor to the underside of
the wiper linkage module motor bracket (Fig. 24).
Fig. 23 Wiper Motor
1 - TRANSMISSION
2 - PIGTAIL WIRE
3 - MOTOR
4 - SCREW (3)
5 - OUTPUT SHAFT
VAWIPERS/WASHERS 8R - 19
WIPER LINKAGE (Continued)

(2) Install and tighten the three screws that secure
the wiper motor to the wiper linkage module motor
bracket. Tighten the screws to 12 N´m (105 in. lbs.).
(3) If this wiper motor is being reinstalled, position
the motor crank arm on the wiper motor output shaft
so that the index marks made during the removal
procedure are aligned. If this is a new wiper motor
installation, the motor crank arm should be installed
so that it is pointed toward the left (driver) side of
the vehicle and parallel with the two wiper drive
links while both wiper blades are positioned on their
alignment marks near the lower edge of the wind-
shield glass.
(4) Install and tighten the nut that secures the
motor crank arm to the wiper motor output shaft.
Tighten the nut to 12 N´m (105 in. lbs.).
(5) Reconnect the vehicle wire harness connector
for the wiper motor to the motor pigtail wire connec-
tor.
(6) Reconnect the battery negative cable.WIPER RELAY
DESCRIPTION
A wiper relay is standard equipment on all models.
The wiper relay (or intermittent wipe relay) is
located in a dedicated receptacle on the bottom left of
the fuse block on the underside of the steering col-
umn (Fig. 25). The wiper relay is a conventional
International Standards Organization (ISO) micro
relay. Relays conforming to the ISO specifications
have common physical dimensions, current capaci-
ties, terminal patterns, and terminal functions. The
relay is contained within a small, rectangular,
molded plastic housing. The relay is connected to all
of the required inputs and outputs through the
instrument panel wire harness connector by five
male spade-type terminals that extend from the bot-
tom of the relay base. The ISO designation for each
terminal is molded into the base adjacent to the ter-
minal. The ISO terminal designations are as follows:
²30 (Common Feed)- This terminal is con-
nected to the movable contact point of the relay.
Fig. 24 Wiper Motor Remove/Install
1 - NUT 4 - PIGTAIL WIRE CONNECTOR
2 - LINK (2) 5 - WIPER MOTOR
3 - MOTOR CRANK ARM 6 - SCREW (3)
8R - 20 WIPERS/WASHERSVA
WIPER MOTOR (Continued)

²85 (Coil Ground)- This terminal is connected
to the ground feed side of the relay control coil.
²86 (Coil Battery)- This terminal is connected
to the battery feed side of the relay control coil.
²87 (Normally Open)- This terminal is con-
nected to the normally open fixed contact point of the
relay.
²87A (Normally Closed)- This terminal is con-
nected to the normally closed fixed contact point of
the relay.
The wiper relay cannot be adjusted or repaired. If
the relay is damaged or faulty, it must be replaced.
OPERATION
The wiper relay (or intermittent wipe relay) is an
electromechanical switch that uses a low current
input from the intermittent wipe logic circuitry
within the fuse block underneath the steering column
to control a high current output to the low speed
brush of the wiper motor. The movable common feed
contact point is held against the fixed normally
closed contact point by spring pressure. When the
relay coil is energized, an electromagnetic field is
produced by the coil windings. This electromagnetic
field draws the movable relay contact point away
from the fixed normally closed contact point, and
holds it against the fixed normally open contact
point. When the relay coil is de-energized, spring
pressure returns the movable contact point back
against the fixed normally closed contact point. A
resistor or diode is connected in parallel with the
relay coil in the relay, and helps to dissipate voltage
spikes and electromagnetic interference that can be
generated as the electromagnetic field of the relay
coil collapses.The wiper relay terminals are connected to the
vehicle electrical system through a connector recepta-
cle in the fuse block. The inputs and outputs of the
wiper relay include:
²The common feed terminal (30) provides an out-
put to the wiper motor low speed brush through the
wiper control circuitry of the multi-function switch on
the steering column. When the wiper relay is de-en-
ergized, the common feed terminal is connected to
the input of the relay normally closed terminal (87).
When the wiper relay is energized, the common feed
terminal is connected to the input of the relay nor-
mally open terminal (87A).
²The coil ground terminal (85) is connected to
battery current through a fused ignition switch out-
put circuit whenever the ignition switch is in the On
position.
²The coil battery terminal (86) is connected to the
relay control output of the wiper, turn signals and
engine start control module within the fuse block
through the wiper relay control circuit. This elec-
tronic circuitry controls the ground path for this cir-
cuit internally to energize or de-energize the wiper
relay control coil based upon its programming and
inputs from the wiper and washer control circuitry of
the multi-function switch, the wiper motor park
switch, and the ignition switch.
²The normally open terminal (87) is connected to
the output of the wiper motor park switch through
the wiper motor park switch sense circuit. This cir-
cuit can carry either battery current (wipers are not
in park position) or ground (wipers are in park posi-
tion), depending upon the status of the wiper park
switch.
²The normally closed terminal (87A) is connected
to battery current through a fused ignition switch
output circuit whenever the ignition switch is in the
On position.
The wiper relay can be diagnosed using conven-
tional diagnostic tools and methods.
Fig. 25 Wiper Relay
1 - HOUSING
2 - TERMINAL (5)
3 - BASE
VAWIPERS/WASHERS 8R - 21
WIPER RELAY (Continued)

REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, SEAT BELT TENSIONER, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE (GROUND) CABLE, THEN WAIT
TWO MINUTES FOR THE SYSTEM CAPACITOR TO
DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE SUPPLEMENTAL
RESTRAINT SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the fuse access panel from the steering
column opening cover below the steering column on
the instrument panel.
(3) Reach through and below the outboard side of
the fuse access opening to access the wiper relay
(Fig. 26).
(4) Remove the wiper relay by grasping it firmly,
releasing the latches and pulling it straight down
from the receptacle on the bottom of the fuse block.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, SEAT BELT TENSIONER, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE (GROUND) CABLE, THEN WAIT
TWO MINUTES FOR THE SYSTEM CAPACITOR TO
DISCHARGE BEFORE PERFORMING FURTHERDIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE SUPPLEMENTAL
RESTRAINT SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
(1) Position the wiper relay to the receptacle on
the bottom of the fuse block (Fig. 26).
(2) Align the wiper relay terminals with the termi-
nal cavities in the fuse block receptacle.
(3) Push firmly and evenly on the top of the wiper
relay until the terminals are fully seated in the ter-
minal cavities in the receptacle of the fuse block and
both latches are fully engaged.
(4) Reinstall the fuse access panel onto the steer-
ing column opening cover below the steering column
on the instrument panel.
(5) Reconnect the battery negative cable.
Fig. 26 Wiper Relay Remove/Install
1 - FUSE BLOCK
2 - LOWER INSTRUMENT PANEL
3 - STEERING COLUMN COVER
4 - LATCH (2)
5 - WIPER RELAY
8R - 22 WIPERS/WASHERSVA
WIPER RELAY (Continued)

WIRING
TABLE OF CONTENTS
page page
WIRING DIAGRAM INFORMATION....... 8W-01-1
COMPONENT INDEX.................. 8W-02-1
POWER DISTRIBUTION............... 8W-10-1
FUSE BLOCK........................ 8W-11-1
GROUND DISTRIBUTION.............. 8W-15-1
BUS COMMUNICATIONS.............. 8W-18-1
CHARGING SYSTEM.................. 8W-20-1
STARTING SYSTEM.................. 8W-21-1
FUEL/IGNITION SYSTEM.............. 8W-30-1
TRANSMISSION CONTROL SYSTEM..... 8W-31-1
VEHICLE SPEED CONTROL............ 8W-33-1
ANTILOCK BRAKES................... 8W-35-1
VEHICLE THEFT SECURITY SYSTEM..... 8W-39-1
INSTRUMENT CLUSTER............... 8W-40-1
HORN/CIGAR LIGHTER................ 8W-41-1
AIR CONDITIONER/HEATER............ 8W-42-1
AIRBAG SYSTEM.................... 8W-43-1
INTERIOR LIGHTING.................. 8W-44-1CENTRAL TIMER MODULE............. 8W-45-1
AUDIO SYSTEM..................... 8W-47-1
REAR WINDOW DEFOGGER............ 8W-48-1
FRONT LIGHTING.................... 8W-50-1
REAR LIGHTING..................... 8W-51-1
TURN SIGNALS...................... 8W-52-1
WIPERS............................ 8W-53-1
TRAILER TOW....................... 8W-54-1
NAVIGATION/TELECOMMUNICATIONS.... 8W-55-1
POWER WINDOWS................... 8W-60-1
POWER DOOR LOCKS................ 8W-61-1
POWER MIRRORS................... 8W-62-1
POWER SEATS...................... 8W-63-1
SPLICE INFORMATION................ 8W-70-1
CONNECTOR PIN-OUTS............... 8W-80-1
CONNECTOR/GROUND/SPLICE
LOCATION........................ 8W-91-1
POWER DISTRIBUTION............... 8W-97-1 VAWIRING 8W - 1

8W-01 WIRING DIAGRAM INFORMATION
TABLE OF CONTENTS
page page
WIRING DIAGRAM INFORMATION
DESCRIPTION
DESCRIPTION - HOW TO USE WIRING
DIAGRAMS...........................1
DESCRIPTION - CIRCUIT INFORMATION....5
DESCRIPTION - SECTION IDENTIFICATION
AND INFORMATION....................5
DESCRIPTION - CONNECTOR, GROUND
AND SPLICE INFORMATION..............5
WARNING
WARNINGS - GENERAL.................6
DIAGNOSIS AND TESTING - WIRING
HARNESS............................6
STANDARD PROCEDURE
STANDARD PROCEDURE -
ELECTROSTATIC DISCHARGE (ESD)
SENSITIVE DEVICES...................7
STANDARD PROCEDURE - TESTING OF
VOLTAGE POTENTIAL...................7
STANDARD PROCEDURE - TESTING FOR
CONTINUITY..........................8STANDARD PROCEDURE - TESTING FOR A
SHORT TO GROUND...................8
STANDARD PROCEDURE - TESTING FOR A
SHORT TO GROUND ON FUSES
POWERING SEVERAL LOADS............8
STANDARD PROCEDURE - TESTING FOR A
VOLTAGE DROP.......................8
CONNECTOR
REMOVAL.............................8
INSTALLATION..........................9
DIODE
REMOVAL.............................9
INSTALLATION..........................9
TERMINAL
REMOVAL.............................9
INSTALLATION.........................10
WIRE
STANDARD PROCEDURE - WIRE SPLICING . . 10
WIRING DIAGRAM
INFORMATION
DESCRIPTION
DESCRIPTION - HOW TO USE WIRING
DIAGRAMS
DaimlerChrysler Corporation wiring diagrams are
designed to provide information regarding the vehi-
cles wiring content. In order to effectively use the
wiring diagrams to diagnose and repair
DaimlerChrysler Corporation vehicles, it is important
to understand all of their features and characteris-
tics.
Diagrams are arranged such that the power (B+)
side of the circuit is placed near the top of the page,
and the ground (B-) side of the circuit is placed near
the bottom of the page (Fig. 1).
All switches, components, and modules are shown
in the at rest position with the doors closed and the
key removed from the ignition (Fig. 2).Components are shown two ways. A solid line
around a component indicates that the component is
complete. A dashed line around the component indi-
cates that the component is being shown is not com-
plete. Incomplete components have a reference
number to indicate the page where the component is
shown complete.
It is important to realize that no attempt is made
on the diagrams to represent components and wiring
as they appear on the vehicle. For example, a short
piece of wire is treated the same as a long one. In
addition, switches and other components are shown
as simply as possible, with regard to function only.
SYMBOLS
International symbols are used throughout the wir-
ing diagrams. These symbols are consistent with
those being used around the world (Fig. 3).
VA8W-01 WIRING DIAGRAM INFORMATION 8W - 01 - 1

Fig. 1 WIRING DIAGRAM EXAMPLE 1
8W - 01 - 2 8W-01 WIRING DIAGRAM INFORMATIONVA
WIRING DIAGRAM INFORMATION (Continued)

Fig. 2 WIRING DIAGRAM EXAMPLE 2
VA8W-01 WIRING DIAGRAM INFORMATION 8W - 01 - 3
WIRING DIAGRAM INFORMATION (Continued)

Fig. 3 Wiring Diagram Symbols
8W - 01 - 4 8W-01 WIRING DIAGRAM INFORMATIONVA
WIRING DIAGRAM INFORMATION (Continued)