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Home >> Hummer >> 2007 >> H3 Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Diagnostic Information and Procedures >> Courtesy Lamps Always On

Courtesy Lamps Always On

Courtesy Lamps Always On

Step Action Yes No
Schematic Reference: Interior Lights Schematics 
Connector End View Reference: Lighting Systems Connector End Views , Data Communication Connector End Views or Vehicle Access Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Verify that the courtesy/dome lamps are always on.
Do the courtesy/dome lamps operate normally?
Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 Inspect for the following related body control module (BCM) module data parameters. Refer to Scan Tool Data List  and Scan Tool Data Definitions  for typical values and definitions:
  • The courtesy lamp switch
  • The dome lamp override switch
  • The driver door ajar switch
  • The passenger door ajar switch

Was a problem found?
Go to Step 4  Go to Step 7 
4 Disconnect and test the switch of the affected input circuit for proper continuity in the open and closed positions. Refer to Circuit Testing .
Does the switch operate properly?
Go to Step 5  Go to Step 6 
5 Test the signal and ground circuits of the affected input circuit for the following:
  • A short to ground
  • An open
  • A high resistance

Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 11  Go to Step 7 
6 Inspect for poor connections at the harness connector of the affected switch. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 11  Go to Step 9 
7 Test for a short to ground in any of the courtesy lamp low control circuits.
Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 11  Go to Step 8 
8 Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 11  Go to Step 10 
9 Replace the switch in the affected circuit. Refer to one of the following replacement procedures as applicable:
Did you complete the replacement?
Go to Step 11  -
10 Replace the BCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?
Go to Step 11  -
11 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 3