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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC P42 Commercial Chassis 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Wipers Low or Mist Modes Inoperative

Wipers Low or Mist Modes Inoperative P32 W/Pulse

Step

Action

Value(s)

Yes

No

1
  1. Turn the ignition switch to the ACCY or RUN position.
  2. Turn the wiper/washer switch to the LOW position.
  3. Backprobe the wiper/washer switch pigtail connector with a J 39200 DMM from cavity E to B +. Refer to Using Connector Test Adapters in Wiring Systems.
  4. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 3

Go to Step 2

2

Replace the wiper/washer switch. Refer to Windshield Wiper and Washer Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column-Tilt.

Is the repair complete?

--

System OK

--

3
  1. Turn and hold the wiper/washer switch in the MIST position.
  2. Backprobe the wiper/washer switch pigtail connector with a J 39200 DMM from cavity E to B +.
  3. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 5

Go to Step 4

4

Replace the wiper/washer switch. Refer to Windshield Wiper and Washer Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column-Tilt.

Is the repair complete?

--

System OK

--

5
  1. Turn the wiper/washer switch to the LOW position.
  2. Backprobe the wiper/washer switch pigtail connector with a J 39200 DMM from cavity F to B +.
  3. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 7

Go to Step 6

6

Replace the wiper/washer switch. Refer to Windshield Wiper and Washer Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column-Tilt.

Is the repair complete?

--

System OK

--

7
  1. Turn and hold the wiper/washer switch in the MIST position.
  2. Backprobe the wiper/washer switch pigtail connector with a J 39200 DMM from cavity F to B +.
  3. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 9

Go to Step 8

8

Replace the wiper/washer switch. Refer to Windshield Wiper and Washer Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column-Tilt.

Is the repair complete?

--

System OK

--

9
  1. Turn the wiper/washer switch to the LOW position.
  2. Backprobe the windshield wiper pulse control module with a J 39200 DMM from cavity E to B +.
  3. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 11

Go to Step 10

10

Replace the windshield wiper pulse control module.

Is the repair complete?

--

System OK

--

11
  1. Backprobe the windshield wiper pulse control module connector with a J 39200 DMM from cavity F to B +.
  2. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 13

Go to Step 12

12

Replace the windshield wiper pulse control module.

Is the repair complete?

--

System OK

--

13
  1. Use a J 39200 DMM to backprobe the wiper/washer provision connector C 207, from cavity C to B +.
  2. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 15

Go to Step 14

14

Repair the open in CKT 91 (GRY) between the windshield wiper pulse control module connector, cavity E and the wiper/washer provision connector C 207, cavity C.

Is the repair complete?

--

System OK

--

15
  1. Use a J 39200 DMM to backprobe the wiper/washer provision connector C 207, from cavity D to B +.
  2. Measure the voltage.

Is the voltage greater than the specified value?

10.0 V

Go to Step 17

Go to Step 16

16

Repair the open in CKT 97 (LT BLU) between the windshield wiper pulse control module connector, cavity F and the wiper/washer provision connector C 207, cavity D.

Is the repair complete?

--

System OK

--

17

Repair the windshield wiper motor or the wiring beyond the wiper/washer provision connector C 207.

Is the repair complete?

--

System OK

--