GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Blazer - 4WD 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Wipers Inoperative - One or More Modes

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
  1. Disconnect the windshield wiper/washer switch connector.
  2. Measure the resistance between the accessory voltage circuit and the windshield wiper switch low/pulse signal circuit of the wiper/washer switch.
  3. Turn the wiper/washer switch to the following positions:
    4. • MIST
    • LO
    • HI

Does the resistance measure greater than the specified value?

2 ohms

Go to Step 10

Go to Step 4

4
  1. Measure the resistance between the accessory voltage circuit and the windshield wiper switch low/pulse signal circuit of the wiper/washer switch.
  2. Turn the wiper/washer switch through the DELAY range.

Does the resistance measure within the specified values?

39K-680K ohms

Go to Step 5

Go to Step 10

5
  1. Measure the resistance between the accessory voltage circuit and the windshield wiper switch on signal circuit of the wiper/washer switch.
  2. Turn the wiper/washer switch to the following positions:
    3. • MIST
    • DELAY
    • LO
    • HI

Does the resistance measure near the specified value?

24K ohms

Go to Step 6

Go to Step 10

6
  1. Reconnect the windshield wiper/washer switch connector.
  2. Turn the wiper/washer switch to HI.

Do the windshield wipers operate properly in HI mode?

--

Go to Step 7

Go to Step 9

7

Test the windshield wiper switch low/pulse signal circuit for high resistance or an open. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs or Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 13

Go to Step 8

8

Test the windshield wiper switch on signal circuit for high resistance or an open. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs or Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 13

Go to Step 11

9

Test the windshield wiper motor high speed circuit for high resistance or an open. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs or Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 13

Go to Step 12

10

Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .

Did you complete the replacement?

--

Go to Step 13

--

11

Replace the windshield wiper module. Refer to Windshield Wiper System Module Replacement .

Did you complete the replacement?

--

Go to Step 13

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12

Replace the windshield wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 13

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13

Operate the wiper/washer system and inspect for proper operation.

Did you correct the condition?

--

System OK

Go to Step 3