GM Service Manual Online
For 1990-2009 cars only

Wipers Inoperative - One or More Modes withoutCE1

Step

Action

Value(s)

Yes

No

1

Did you review the Wiper/Washer System Description and Operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Wiper/Washer Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Turn the windshield wiper/washer switch through all the switch positions.

Do the windshield wipers operate properly in all modes?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Do the wipers operate properly in HI?

--

Go to Step 4

Go to Step 5

4

Do the wipers operate properly in LO?

--

Go to Step 12

Go to Step 7

5

  1. Disconnect wiper motor connector C2.
  2. Turn the wiper switch to HI.
  3. Connect a test lamp between the windshield wiper high speed circuit and a good ground.

Does the test lamp illuminate?

--

Go to Step 19

Go to Step 6

6

Test the windshield wiper motor high speed circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

7

  1. Disconnect wiper motor connector C1.
  2. Turn the wiper switch to LO.
  3. Connect a test lamp between the windshield wiper motor relay coil supply voltage circuit and a good ground.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 10

8

Connect a test lamp between the windshield wiper motor low speed circuit and a good ground.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 11

9

Test the windshield wiper motor park switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 18

10

Test the windshield wiper motor relay coil supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

11

Test the windshield wiper motor low speed circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

12

  1. Turn the ignition OFF.
  2. Disconnect the windshield wiper switch connector.
  3. Measure the resistance from the accessory voltage circuit of the windshield wiper switch to the windshield washer switch signal circuit of the windshield wiper switch.
  4. Turn the windshield wiper switch through the DELAY range.

Does the resistance measure within the specified values?

115K-1.2M ohms

Go to Step 13

Go to Step 17

13

  1. Turn the windshield wiper switch to the DELAY position.
  2. Measure the resistance from the accessory voltage circuit of the windshield wiper switch to the windshield wiper motor relay coil supply voltage circuit of the windshield wiper switch.

Does the resistance measure less than the specified value?

3 ohms

Go to Step 14

Go to Step 17

14

Test the windshield wiper motor relay coil supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 15

15

Test the windshield washer switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 16

16

  1. Remove the wiper motor cover. Refer to Wiper Motor Cover Replacement .
  2. Inspect for a poor connection from the park switch terminals to the circuit board of the wiper motor cover.

Did you find a poor connection?

--

Go to Step 20

Go to Step 21

17

Replace the windshield wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

--

Go to Step 23

--

18

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement

Did you complete the replacement?

--

Go to Step 22

--

19

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement

Did you complete the replacement?

--

Go to Step 23

--

20

Replace the wiper motor park switch. Refer to Wiper Motor Park Switch Replacement .

Did you complete the replacement?

--

Go to Step 23

--

21

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement

Did you complete the replacement?

--

Go to Step 23

--

22

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 19

23

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3

Wipers Inoperative - One or More Modes with CE1

Step

Action

Value(s)

Yes

No

1

Did you review the Wiper/Washer System Description and Operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Wiper/Washer Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Turn the windshield wiper/washer switch through all the switch positions.

Do the windshield wipers operate properly in all modes?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Do the wipers operate properly in HI?

--

Go to Step 4

Go to Step 5

4

Do the wipers operate properly in LO?

--

Go to Step 12

Go to Step 7

5

  1. Disconnect wiper motor connector C2.
  2. Turn the wiper switch to HI.
  3. Connect a test lamp between the windshield wiper high speed circuit and a good ground.

Does the test lamp illuminate?

--

Go to Step 24

Go to Step 6

6

Test the windshield wiper motor high speed circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 23

7

  1. Disconnect wiper motor connector C1.
  2. Turn the wiper switch to LO.
  3. Connect a test lamp between the windshield wiper motor relay coil supply voltage circuit and a good ground.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 10

8

Connect a test lamp between the windshield wiper motor low speed circuit and a good ground.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 11

9

Test the windshield wiper motor park switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 25

10

Test the windshield wiper motor relay coil supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 4

11

Test the windshield wiper motor low speed circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 23

12

  1. Disconnect the rain sensor connector.
  2. Connect a test lamp between the accessory voltage circuit of the rain sensor and the ground circuit of the rain sensor.

Does the test lamp illuminate?

--

Go to Step 14

Go to Step 13

13

Connect a test lamp between the accessory voltage circuit of the rain sensor and a good ground.

Does the test lamp illuminate?

--

Go to Step 19

Go to Step 20

14

  1. Disconnect the windshield wiper switch connector.
  2. Test the windshield washer switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 15

15

  1. Connect the rain sensor connector.
  2. Measure the resistance from the accessory voltage circuit of the windshield wiper switch to the windshield washer switch signal circuit of the windshield wiper switch.
  3. Turn the windshield wiper switch through the AUTO DELAY range.

Does the resistance measure within the specified values?

115K-1.2M ohms

Go to Step 16

Go to Step 23

16

  1. Turn the windshield wiper switch to the AUTO DELAY position.
  2. Measure the resistance from the accessory voltage circuit of the windshield wiper switch to the windshield wiper motor relay coil supply voltage circuit of the windshield wiper switch.

Does the resistance measure less than the specified value?

3 ohms

Go to Step 17

Go to Step 23

17

  1. Disconnect wiper motor connector C1.
  2. Measure the resistance in the windshield wiper switch high signal circuit.

Does the resistance measure less than the specified value?

3 ohms

Go to Step 18

Go to Step 21

18

Measure the resistance in the windshield wiper switch low signal circuit.

Does the resistance measure less than the specified value?

3 ohms

Go to Step 26

Go to Step 22

19

Repair the open in the rain sensor ground circuit.

Did you complete the repair?

--

Go to Step 30

--

20

Repair the open in the rain sensor accessory voltage circuit.

Did you complete the repair?

--

Go to Step 30

--

21

Repair the open in the windshield wiper switch high signal circuit.

Did you complete the repair?

--

Go to Step 30

--

22

Repair the open in the windshield wiper switch low signal circuit.

Did you complete the repair?

--

Go to Step 30

--

23

Replace the windshield wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

--

Go to Step 30

--

24

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement

Did you complete the replacement?

--

Go to Step 30

--

25

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement

Did you complete the replacement?

--

Go to Step 28

--

26

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement

Did you complete the replacement?

--

Go to Step 29

--

27

Replace the rain sensor. Refer to Windshield Outside Moisture Sensor Replacement .

Did you complete the replacement?

--

Go to Step 30

--

28

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 24

29

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 27

30

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3