Test Description

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

3: 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.
4: Tests the ability of the BCM to energize the relay.
5: Tests for a condition which causes the relay to remain energized at all times.

DTC B3810 or B3811 Diagnostic Test

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 Wiper/Washer System Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Wiper/Washer
2	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, command the relay ON and OFF. 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	Turn OFF the ignition. Disconnect the relay. Refer to Electrical Center Identification Views in Wiring Systems for relay location. Turn ON the ignition, with the engine OFF. 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	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. 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 Circuit Testing and Wiring Repairs in Wiring Systems. Refer to Electrical Center Identification Views in Wiring Systems for relay location. 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 Circuit Testing and Wiring Repairs in Wiring Systems. Refer to Electrical Center Identification Views in Wiring Systems for relay location. Did you find and correct the condition?	Go to Step 13	Go to Step 9
8	Inspect for poor connections at the relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Refer to Electrical Center Identification Views in Wiring Systems for relay location. 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	IMPORTANT: Perform the setup procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.Did you complete the replacement?	Go to Step 13	-
13	Use the scan tool in order to clear the DTCs. Operate the system in order to verify the repair. Does the DTC reset?	Go to Step 2	System OK