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Diagnostic Aids

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Perform a visual inspection for loose or poor connections at all related components. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B3873

Step Action Yes No
Schematic Reference: Wiper/Washer System Schematics 
Connector End View Reference: Master Electrical Component List in Wiring Systems
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Turn the ignition to the ON position.
  2. Press the windshield washer switch.
Does the windshield washer pump operate?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Turn the ignition to the OFF position.
  2. Disconnect the windshield washer fluid pump.
  3. Using a test lamp connected to ground, probe the windshield washer pump control circuit at the harness connector of the windshield washer fluid pump.
Does the test lamp illuminate?		 Go to Step 6  Go to Step 4 
4
  1. Leave the test lamp connected.
  2. Turn the ignition to the ON position.
  3. Press the washer switch.
Does the test lamp illuminate?		 Go to Step 5  Go to Step 7 
5
  1. Turn the ignition to the OFF position.
  2. Using a test lamp, probe between the windshield washer pump control circuit and the windshield washer fluid pump ground circuit at the harness connector of the windshield washer fluid pump.
  3. Turn the ignition to the ON position.
  4. Press the washer switch.
Does the test lamp illuminate?		 Go to Step 9  Go to Step 8 
6 Test for a short to battery positive voltage in the windshield washer pump control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
7 Test for a short to ground or an open in the windshield washer pump control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
8 Repair a poor connection or an open in the windshield washer fluid pump ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 11  -
9 Replace the windshield washer fluid pump. Refer to Washer Pump Replacement .
Did you complete the replacement?		 Go to Step 11  -
10 Replace the body control module (BCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?		 Go to Step 11  -
11
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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