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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1936 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> Windshield Wiper Washer System Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Multifunction Switch

  1. With the WASH switch in the open position, test for infinite resistance between the low reference terminal 8 and the signal terminal 9.
    • If not the specified value, replace the multifunction switch.
  2. With the WASH switch in the closed position, test for less than 2 ohms between the ground terminal 8 and the signal terminal 9.
    • If greater than the specified range, replace the multifunction switch.

Washer Pump

  1. Ignition OFF, disconnect the harness connector at the washer pump.
  2. Install a 10A fused jumper wire between the control terminal A and 12 volts. Install a jumper wire between the ground terminal B and ground.
  3. Verify the washer pump is activated.
    • If the washer pump does not activate, replace the washer pump.
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