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Courtesy Lamps Always On

Courtesy Lamps Always On

Step Action Yes No
Schematic Reference: Interior Lights Schematics 
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. Ensure the instrument panel (I/P) dimmer switch is not in the ON position.
  2. Close all of the vehicle doors.
  3. Wait 20 seconds.
Are the courtesy lamps illuminated?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 Use the scan tool in order to command the courtesy lamps OFF.
Do the courtesy lamps turn OFF?		 Go to Step 4  Go to Step 6 
4
  1. Close all of the vehicle doors.
  2. With a scan tool, observe the Driver Door Ajar Sw. parameter and the Passenger Door Ajar Sw. parameter in the Lamp Status data list.
Does the scan tool indicate that both parameters are OFF?		 Go to Step 13  Go to Step 5 
5 Does the scan tool indicate that the Driver Door Ajar Sw. parameter is ON? Go to Step 8  Go to Step 9 
6 Disconnect the I/P dimmer switch.
Are the courtesy lamps illuminated?		 Go to Step 7  Go to Step 12 
7
  1. Disconnect the body control module (BCM).
  2. Test the courtesy lamp low control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 17  Go to Step 13 
8
  1. Disconnect the driver door jamb switch.
  2. Observe the Driver Door Ajar Sw. parameter as you disconnect the switch.
Does the scan tool indicate that the Driver Door Ajar Sw. parameter is OFF when the driver door jamb switch is disconnected?		 Go to Step 15  Go to Step 10 
9
  1. Disconnect the passenger door jamb switches one at a time.
  2. Observe the Passenger Door Ajar Sw. parameter as you disconnect each switch.
Does the scan tool indicate that the Passenger Door Ajar Sw. parameter is OFF when one of the passenger door jamb switches is disconnected?		 Go to Step 15  Go to Step 11 
10 Test the drivers door jamb switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 17  Go to Step 13 
11 Test the passengers door jamb switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 17  Go to Step 13 
12 Inspect for poor connections at the harness connector of the I/P dimmer switch. 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 17  Go to Step 14 
13 Inspect for poor connections at the harness connector of the 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 17  Go to Step 16 
14 Replace the I/P dimmer switch. Refer to Instrument Panel (I/P) Dimmer Switch Replacement .
Did you complete the replacement?		 Go to Step 17  -
15 Replace the inoperative door jamb switch. Refer to Door Jamb Switch Replacement - Front .
Did you complete the replacement?		 Go to Step 17  -
16 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 17  -
17 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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