Durango 2WD V8-4.7L VIN N (2001)
Wiper Relay: Testing and Inspection
Front Wiper Relay Test
Fig. 9 Front Wiper Relay
The front wiper relay (or intermittent wipe relay) 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 front wiper relay identification and location.
1. Remove the front wiper relay from the PDC. (Refer to FRONT 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 (electromagnet) 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 circuits. 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 front 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 front wiper motor park switch through the CTM on the front wiper park switch sense
circuit. There should be continuity between the receptacle for terminal 87A of the front 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 front wiper motor as required.
3. The relay normally open terminal (87) is connected to a fused ignition switch output (run-acc) fuse in the Junction Block (JB) through a fused
ignition switch output (run-acc) circuit. There should be battery voltage at the receptacle for terminal 87 of the front 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 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) circuit. There should be battery voltage at the receptacle for terminal 86 of the front wiper relay in the PDC whenever the ignition switch
is in the ON or Accessory positions. If OK, go to Step 5. If not OK, repair the open fused ignition switch output (run-acc) circuit 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 front 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.
