Identifying Interior Light System Malfunctions

NOTE: Perform SYSTEM ID TEST 1A before proceeding with this test. For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER - INTRODUCTION. Perform VERIFICATION TEST: VER-2A after each repair.

CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.

Using scan tool, select BODY, then BODY COMPUTER. Verify communication with Body Control Module (BCM). If scan tool displays NO RESPONSE, see appropriate VEHICLE COMMUNICATIONS article. If scan tool does not display NO RESPONSE, go to next step.
Using scan tool, select READ DTCS. If scan tool displays HEADLAMP SWITCH INPUT FAILURE, go to INTERIOR LIGHT TEST 2A . If HEADLAMP SWITCH INPUT FAILURE DTC is not displayed, identify problem(s) listed in INTERIOR LIGHT DIAGNOSTIC TEST DIRECTORY table and perform indicated test(s).

INTERIOR LIGHT DIAGNOSTIC TEST DIRECTORY

Problem

Perform INTERIOR LIGHT

Courtesy Light Output Short To Battery

TEST 2A

Courtesy Lights Inoperative From All Doors And Courtesy Light Switch

TEST 3A

Inoperative Courtesy Lights

TEST 4A

Courtesy Light Remain On

TEST 5A

Courtesy Light Switch Inoperative

TEST 6A

Illuminated Entry Inoperative

⁽¹⁾

⁽¹⁾	Courtesy lights and door locks operate properly. Replace Body Control Module (BCM).