Dodge Dakota (R1). Manual — part 363
the multi-function switch, and inputs from the wiper
motor park switch.
• The coil battery terminal (86) is connected to
battery current from a fuse in the Junction Block
(JB) through a fused ignition switch output (run-acc)
circuit whenever the ignition switch is in the On or
Accessory positions.
• The normally open terminal (87) is connected to
battery current from a fuse in the Junction Block
(JB) through a fused ignition switch output (run-acc)
circuit whenever the wiper relay control coil is ener-
gized by the CTM. This circuit provides fused igni-
tion switch output (run-acc) current to the wiper
motor low speed brush only when the wiper relay
control coil is energized.
• The normally closed terminal (87A) is connected
to the output of the wiper motor park switch through
the CTM on the front wiper park switch sense cir-
cuit. This circuit provides battery current (wipers are
not parked) or ground (wipers are parked) to the
wiper motor low speed brush whenever the wiper
relay control coil is de-energized and the Off position
of the wiper control circuitry within the multi-func-
tion switch is selected.
The wiper relay can be diagnosed using conven-
tional diagnostic tools and methods.
DIAGNOSIS AND TESTING - WIPER RELAY
The wiper relay (or intermittent wipe relay) (Fig.
12) is located in the Power Distribution Center (PDC)
in the engine compartment. See the fuse and relay
layout label affixed to the inside surface of the PDC
cover for wiper relay identification and location.
Refer to the appropriate wiring information. The wir-
ing information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
(1) Remove the wiper relay from the PDC. (Refer
to
8
-
ELECTRICAL/WIPERS/WASHERS/WIPER
RELAY - REMOVAL).
(2) A relay in the de-energized position should
have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30. If OK, go
to Step 3. If not OK, replace the faulty relay.
(3) Resistance between terminals 85 and 86 (elec-
tromagnet) should be 75 ± 5 ohms. If OK, go to Step
4. If not OK, replace the faulty relay.
(4) Connect a battery to terminals 85 and 86.
There should now be continuity between terminals
30 and 87, and no continuity between terminals 87A
and 30. If OK, test the relay input and output cir-
cuits. Refer to RELAY CIRCUIT TEST . If not OK,
replace the faulty relay.
RELAY CIRCUIT TEST
(1) The relay common feed terminal cavity (30) is
connected to the multi-function switch. There should
be continuity between the receptacle for terminal 30
of the wiper relay in the PDC and the intermittent
front wiper low speed circuit cavity of the instrument
panel wire harness connector for the multi-function
switch at all times. If OK, go to Step 2. If not OK,
repair the open intermittent front wiper low speed
circuit between the PDC and the multi-function
switch as required.
(2) The relay normally closed terminal (87A) is
connected to the wiper motor park switch through
the CTM on the front wiper park switch sense cir-
cuit. There should be continuity between the recepta-
cle for terminal 87A of the wiper relay in the PDC
and the front wiper park switch sense circuit cavity
of the headlamp and dash wire harness connector for
the wiper motor at all times. If OK, go to Step 3. If
not OK, repair the open front wiper park switch
sense circuit between the PDC and the wiper motor
as required.
(3) The relay normally open terminal (87) is con-
nected to a fused ignition switch output (run-acc)
fuse in the Junction Block (JB) through a fused igni-
tion switch output (run-acc) circuit. There should be
battery voltage at the receptacle for terminal 87 of
the wiper relay in the PDC whenever the ignition
switch is in the On or Accessory positions. If OK, go
to Step 4. If not OK, repair the open fused ignition
Fig. 12 Wiper Relay
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
8R - 18
WIPERS/WASHERS
AN
WIPER RELAY (Continued)
switch output (run-acc) circuit between the PDC and
the JB as required.
(4) The coil battery terminal (86) is connected to a
fused ignition switch output (run-acc) fuse in the JB
through a fused ignition switch output (run-acc) cir-
cuit. There should be battery voltage at the recepta-
cle for terminal 86 of the wiper relay in the PDC
whenever the ignition switch is in the On or Acces-
sory positions. If OK, go to Step 5. If not OK, repair
the open fused ignition switch output (run-acc) cir-
cuit between the PDC and the JB as required.
(5) The coil ground terminal (85) is connected to
the output of the Central Timer Module (CTM)
through the wiper relay control circuit. There should
be continuity between the receptacle for terminal 85
of the wiper relay in the PDC and the wiper relay
control circuit cavity of the instrument panel wire
harness connector (Connector C3) for the CTM at all
times. If not OK, repair the open wiper relay control
circuit between the PDC and the CTM as required.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the cover from the Power Distribution
Center (PDC) (Fig. 13).
(3) See the fuse and relay layout label affixed to
the underside of the PDC cover for wiper relay iden-
tification and location.
(4) Remove the wiper relay by grasping it firmly
and pulling it straight out from the receptacle in the
PDC.
INSTALLATION
(1) See the fuse and relay layout label affixed to
the underside of the PDC cover for the proper wiper
relay location (Fig. 13).
(2) Position the wiper relay in the proper recepta-
cle in the PDC.
(3) Align the wiper relay terminals with the termi-
nal cavities in the PDC receptacle.
(4) Push firmly and evenly on the top of the wiper
relay until the terminals are fully seated in the ter-
minal cavities in the PDC receptacle.
(5) Reinstall the cover onto the PDC.
Fig. 13 Power Distribution Center - Typical
1 - CLIP
2 - BATTERY
3 - TRAY
4 - NEGATIVE CABLE
5 - POSITIVE CABLE
6 - CLIP
7 - FENDER INNER SHIELD
8 - POWER DISTRIBUTION CENTER
AN
WIPERS/WASHERS
8R - 19
WIPER RELAY (Continued)
WIRING
TABLE OF CONTENTS
page
page
R1
WIRING
8Wa - 1
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