Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

This DTC will clear on current status after the condition for setting the fault is corrected.
A history DTC will clear after 100 consecutive ignition cycles without a fault present.
History and current DTCs can be cleared using a scan tool.

DTC B3802

Step	Action	Yes	No
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System
1	Did you perform the Lighting Systems Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Lighting Systems
2	Install a scan tool. Turn the headlamp switch to park lamps ON. With a scan tool, observe the Park Lamp Switch and the Headlamp Switch parameters in the body control module (BCM) data list. Does the scan tool display park lamps ACTIVE and the headlamps INACTIVE?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Test the park lamp switch ON signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition?	Go to Step 10	Go to Step 4
4	Test the headlamp switch headlamps ON signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition?	Go to Step 10	Go to Step 5
5	Disconnect the headlamp switch. Turn the headlamp switch to the ON position. Test for continuity between the ground terminal and the park lamp switch signal terminal of the headlamp switch. Refer to Circuit Testing in Wiring Systems. Test for continuity between the ground terminal and the headlamp switch headlamps on signal terminal of the headlamp switch. Refer to Circuit Testing in Wiring Systems. Is continuity present?	Go to Step 6	Go to Step 7
6	Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 10	Go to Step 8
7	Inspect for poor connections at the harness connector of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 10	Go to Step 9
8	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 10	-
9	Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement?	Go to Step 10	-
10	Use the scan tool in order to clear the DTCs. 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