Wipers Inoperative - One or More Modes Front Wipers
Diagnostic Aids
The Wash mode for this diagnostic procedure is defined as the mode when the wiper switch is OFF and only the windshield washer switch has been activated. When the washer switch is activated with the wiper switch OFF, the wipers should wipe the windshield 3-5 times and then park.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step will pinpoint which specific wiper functions are inoperative. The wipers should operate for all active windshield wiper switch positions. When the wiper switch is OFF and only the windshield washer switch is activated, the wipers should wipe the windshield 3-5 times and then park.
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This step will help to pinpoint which specific circuit or component may be involved in the malfunction. When the Wash, and Park modes are inoperative as well as the Intermittent mode, the windshield wiper switch mist/off/low signal circuit and associated components are suspect. When the wipers operate for the Park mode but the Intermittent and Wash modes are both inoperative, suspect the accessory voltage feed circuit of the FRT WIPER Relay or an associated component.
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This step is used when the wipers fail to wipe the windshield while only the washer switch is activated.
-
This step is used when the wipers still operate in all wiping modes, but fail to Park at the full down position. If this condition is present while the wipers are being operated in the Intermittent mode, the wipers typically will not return to the full down position. Instead, they will stop at random positions on the windshield and in between the timed wiper strokes. Or, if the wipers are being operated in either the High or Low mode, the wipers will stop in mid-stroke when the wiper switch is turned OFF.
Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Master Electrical Component List DEFINITION: The front windshield wipers are inoperative in one or more modes. The windshield washer still operates. | |||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||
Do the windshield wipers operate as described in the Description and Operation? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 | |||||
3 | Are the windshield wipers completely inoperative? | Go to Step 10 | Go to Step 4 | ||||
4 | Are the windshield wipers inoperative for every mode except High speed? | Go to Step 11 | Go to Step 5 | ||||
5 | Are the wipers inoperative in the Intermittent mode? | Go to Step 6 | Go to Step 7 | ||||
In addition to the Intermittent mode, are the windshield wipers inoperative for one or both of the following two modes?
| Go to Step 17 | Go to Step 14 | |||||
7 |
Important: When the windshield washer mode is activated with the windshield wiper switch OFF, the windshield wipers should wipe the windshield 3-5 times and then park. Are the wipers inoperative for only the Wash mode? | Go to Step 12 | Go to Step 8 | ||||
8 | Are the wipers inoperative for only the Park mode? | Go to Step 13 | Go to Step 9 | ||||
9 | The wipers are inoperative for only the High speed mode.
Does the test lamp illuminate? | Go to Step 24 | Go to Step 22 | ||||
10 | The windshield wipers are totally inoperative.
Disconnect the windshield wiper motor harness connector. Does the test lamp illuminate? | Go to Step 16 | Go to Step 29 | ||||
11 | The windshield wipers operate only in High speed.
Does the test lamp illuminate? | Go to Step 24 | Go to Step 20 | ||||
The windshield wipers are inoperative for only the Wash mode.
Does the test lamp illuminate? | Go to Step 25 | Go to Step 21 | |||||
The wipers are inoperative for only the Park mode.
Is there continuity? | Go to Step 15 | Go to Step 24 | |||||
14 | The wipers are inoperative for only the Intermittent mode.
Is the test lamp illuminated for all of the Intermittent positions? | Go to Step 25 | Go to Step 23 | ||||
15 |
Does the test lamp illuminate? | Go to Step 33 | Go to Step 30 | ||||
16 |
Does the test lamp illuminate for both the high and the low positions? | Go to Step 24 | Go to Step 26 | ||||
17 |
Does the test lamp illuminate? | Go to Step 18 | Go to Step 28 | ||||
18 |
Does the test lamp illuminate? | Go to Step 19 | Go to Step 27 | ||||
19 | With the test lamp connected to ground, probe the windshield wiper switch low speed circuit, at the windshield wiper switch terminal. Does the test lamp illuminate? | Go to Step 33 | Go to Step 26 | ||||
20 | Test the windshield wiper motor low speed circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 26 | ||||
21 | Test the windshield washer pump control circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 26 | ||||
22 | Test the windshield wiper motor high speed circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 26 | ||||
23 | Test the windshield wiper switch pulse delay signal circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 26 | ||||
24 | Inspect for poor connections at the harness connector of the windshield wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 32 | ||||
25 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 34 | ||||
26 | Inspect for poor connections at the harness connector of the windshield wiper washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 35 | Go to Step 31 | ||||
27 | Repair the windshield wiper switch mist/off/low signal circuit for an open or a high resistance. Refer to Connector Repairs and Wiring Repairs . Did you complete the repair? | Go to Step 35 | -- | ||||
28 | Repair the accessory voltage feed circuit for an open or a high resistance. Refer to Connector Repairs and Wiring Repairs . Did you complete the repair? | Go to Step 35 | -- | ||||
29 | Repair the open ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 35 | -- | ||||
30 | Repair the windshield wiper motor park switch signal circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 35 | -- | ||||
31 | Replace the windshield wiper washer switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the replacement? | Go to Step 35 | -- | ||||
32 | Replace the windshield wiper motor. Refer to Windshield Wiper Motor Replacement . Did you complete the replacement? | Go to Step 35 | -- | ||||
33 | Replace the FRT WIPER relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 35 | -- | ||||
34 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 35 | -- | ||||
35 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | ||||
Wipers Inoperative - One or More Modes Rear Wipers
Diagnostic Aids
Except for when it is in the Wash mode, the rear window wiper wipes the rear window at delay time intervals. With the rear wiper system activated, the length of time between wipes can be adjusted by selecting any one of the three delay speed settings of the windshield wiper switch.
During the Wash mode, if the rear washer switch is momentarily turned to ON, the rear wiper will wipe the rear window 3-5 times and then park. However, if the rear washer switch is held to ON, the rear window wipers will continue to operate until the switch is released.
While the delay speed of both the front and rear wipers is adjusted by the windshield wiper switch selections, the delay time intervals of the rear wiper are not synchronized with the delay time intervals of the front wipers.
The rear wiper should stop at the Park position anytime the rear wiper is not wiping. However, if the ignition switch is turned OFF while the rear wiper is wiping, the wiper will stop at its current location on the glass.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step will determine if the rear wiper operates properly when only the rear window washer switch is activated. When the rear window washer switch is operated with the rear wiper switch OFF, the rear wiper should wipe the window 3-5 times and then park.
-
This step helps to pinpoint the specific malfunction. The Park mode of the rear window wiper may be the only feature malfunctioning. When the rear wiper switch is ON, the rear wiper should stop at the parked position in between the timed strokes of the wiper. When the rear wiper switch is turned OFF, the rear wiper should park and remain in the parked position until either the wipe or wash mode is operated again.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Master Electrical Component List DEFINITION: The rear wiper is inoperative in one or more modes, however the rear washer still operates. | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
Does the rear window wiper operate? | Go to Step 3 | Go to Step 5 | |
3 |
Does the rear window wiper operate? | Go to Step 4 | Go to Step 7 |
|
Important: Unless the rear window wiper is being operated for the Wash mode, it operates only in the delay modes. When the rear wiper is ON, it should stop at the parked position in between timed strokes of the wiper. When the rear wiper is turned OFF, it should park and remain in the parked position until either the wiper or wash mode is operated again. Does the rear window wiper Park in the full down position as it should? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 9 | |
5 | Turn the rear window washer switch ON. Does the rear window wiper operate? | Go to Step 8 | Go to Step 6 |
6 |
Does the test lamp illuminate? | Go to Step 10 | Go to Step 20 |
7 |
Does the test lamp illuminate? | Go to Step 17 | Go to Step 13 |
8 |
Does the test lamp illuminate? | Go to Step 17 | Go to Step 14 |
9 |
Does the test lamp illuminate? | Go to Step 16 | Go to Step 19 |
10 |
Does the rear wiper operate? | Go to Step 24 | Go to Step 11 |
11 |
Does the test lamp illuminate? | Go to Step 12 | Go to Step 21 |
12 | Connect the test lamp between the rear window wiper motor control circuit and the rear window wiper motor ground circuit. Does the test lamp illuminate? | Go to Step 16 | Go to Step 18 |
13 | Test the rear window washer pump control circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 26 | Go to Step 15 |
14 | Test the rear wiper switch signal circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 26 | Go to Step 15 |
15 | Inspect for poor connections at the harness connector of the windshield wiper washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 26 | Go to Step 22 |
16 | Inspect for poor connections at the harness connector of the rear window wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 26 | Go to Step 23 |
17 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 26 | Go to Step 25 |
18 | Repair the rear window wiper motor ground circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 26 | -- |
19 | Repair the accessory voltage circuit, between the REAR WIPER Relay splice and the wiper motor, for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 26 | -- |
20 | Repair the open or high resistance in the accessory voltage feed circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 26 | -- |
21 | Repair the open or high resistance in the rear window wiper motor control circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 26 | -- |
22 | Replace the windshield wiper washer switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the replacement? | Go to Step 26 | -- |
23 | Replace the rear window wiper motor. Refer to Windshield Wiper Motor Replacement . Did you complete the replacement? | Go to Step 26 | -- |
24 | Replace the rear wiper relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 26 | -- |
25 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 26 | -- |
26 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
