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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Wipers And Washers) >> Diagnostic Information and Procedures >> Wipers Inoperative - One or More Modes >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 5:  This step tests for continuity through the 390 Ω resistor in the windshield wiper/washer switch.
  2. 6:  This step tests for continuity through the delay resistors in the windshield wiper/washer switch. The measured resistance will change in sequence from low to high as the delay speed is increased.
Wipers Inoperative - One or More Modes

Step Action Values Yes No
Schematic Reference: Wiper/Washer Schematics 
Connector End View Reference: Wiper/Washer Connector End Views 
DEFINITION: Windshield wipers are inoperative in one or more modes.
1 Did you perform 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.
  2. Attempt to operate the windshield wipers in all modes.
Does the system operate normally?		 - Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 Do the windshield wipers operate in the high speed mode? - Go to Step 5  Go to Step 4 
4
  1. Disconnect the turn signal/multifunction switch connectors.
  2. Connect a fused jumper wire from the windshield wiper switch high signal circuit terminal in the body harness connector half to a good ground.
  3. Turn ON the ignition.
Do the windshield wipers operate at high speed?		 - Go to Step 8  Go to Step 7 
5 
  1. Disconnect the turn signal/multifunction switch connectors.
  2. Test the resistance from the windshield wiper switch signal circuit terminal to the low reference circuit terminal in the turn signal/multifunction switch.
  3. Operate the windshield wiper/washer switch in the following positions:
    • MIST
    • LO
Is the resistance near the specified value in the listed switch positions?		 390 Ω Go to Step 6  Go to Step 11 
6 
  1. Test the resistance from the windshield wiper switch signal circuit terminal to the low reference circuit terminal in the turn signal/multifunction switch.
  2. Operate the windshield wiper/washer switch in all of the delay positions.
Does the resistance remain within the specified values from low to high as the delay speed is increased?		 1K Ω-10K Ω Go to Step 9  Go to Step 11 
7
  1. Disconnect the windshield wiper motor and module connector.
  2. Test the windshield wiper switch high signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 14 
8 Test the windshield wiper switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 12 
9 Test the windshield 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 16  Go to Step 10 
10 Test the windshield wiper switch low reference circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 14 
11 Test the windshield wiper switch signal and low reference circuits in the steering column harness for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 12 
12 Inspect for poor connections at the turn signal/malfunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 13 
13 Replace the turn signal/malfunction switch. Refer to Turn Signal Multifunction Switch Replacement .
Is the repair complete?		 - Go to Step 16  -
14 Inspect for poor connections at the windshield wiper motor and module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 15 
15 Replace the windshield wiper motor cover. Refer to Wiper Motor Cover Replacement - Front .
Is the repair complete?		 - Go to Step 16  -
16 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 3 
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