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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1759 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B3810 OR B3811: HEADLAMP WASHER RELAY CIRCUIT, REAR WASHER RELAY CIRCUITTEST DESCRIPTION
2004 Oldsmobile Bravada AWD

Test Description

2004 Oldsmobile Bravada AWDSECTION Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Isuzu Ascender, 2005 GMC Envoy XUV, 2005 GMC Envoy XL, 2005 GMC Envoy, and 2005 Chevrolet TrailBlazer. 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. 3:  This step tests for battery positive voltage to the high side of the relay coil. The WASH fuse supplies power to the headlamp washer and rear washer relays.
  2. 4:  This step tests the ability of the BCM to energize the relay.
  3. 5:  This step tests for a condition which causes the relay to remain energized at all times.
DTC B3810 or B3811

Step Action Yes No
Schematic Reference: Wiper/Washer System Schematics 
Connector End View Reference: Wiper/Washer System Connector End Views 
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. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the relay ON and OFF.
  4. Refer to Electrical Center Identification Views in Wiring Systems for relay location.
Does the relay turn ON and OFF with each command?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the relay. Refer to Electrical Center Identification Views in Wiring Systems for relay location.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the battery positive voltage circuit of the relay with a test lamp that is connected to a good ground.
Does the test lamp illuminate?		 Go to Step 4  Go to Step 10 
4 
  1. Connect a test lamp between the control circuit of the relay and the battery positive voltage circuit of the relay. Refer to Electrical Center Identification Views in Wiring Systems for relay location.
  2. With a scan tool, command the relay ON and OFF.
Does the test lamp turn ON and OFF with each command?		 Go to Step 8  Go to Step 5 
5  Does the test lamp remain illuminated with each command? Go to Step 7  Go to Step 6 
6 Test the control circuit of the relay for a short to voltage or an open. Refer to the following in Wiring Systems:
Did you find and correct the condition?		 Go to Step 13  Go to Step 9 
7 Test the control circuit of the relay for a short to ground. Refer to the following in Wiring Systems:
Did you find and correct the condition?		 Go to Step 13  Go to Step 9 
8 Test the control circuit of the relay for a short to ground. Refer to the following in Wiring Systems:
Did you find and correct the condition?		 Go to Step 13  Go to Step 11 
9 Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 12 
10 Repair the battery positive voltage circuit of the relay. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 13  -
11 Replace the relay. Refer to Electrical Center Identification Views in Wiring Systems for relay location.
Did you complete the replacement?		 Go to Step 13  -
12 Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 13  -
13
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the system in order to verify the repair.
Does the DTC reset?		 Go to Step 2  System OK
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.