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Home >> Cadillac >> 2007 >> STS V >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System - Troubleshooting >> 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: Master Electrical Component List
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Close all doors.
  2. Turn OFF the interior lamp switch.
  3. Turn ON the ignition, with the engine OFF.
Are the courtesy lamps ON?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections
3
  1. Install a scan tool.
  2. Close all doors.
  3. With a scan tool, observe the Door Open Switch parameter in the individual door module data lists.
Does the scan tool indicate that the Door Open Switch parameter is CLOSED for all doors?		 Go to Step 4  Go to Step 6 
4
  1. Turn the interior lamp switch to the OFF position.
  2. With a scan tool, observe the Courtesy Lamp Switch parameter in the instrument panel module (IPM) inputs data list.
Does the scan tool display OFF?		 Go to Step 9  Go to Step 5 
5
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel (I/P) dimmer switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Courtesy Lamp Switch parameter in the IPM inputs data list.
Does the scan tool display OFF?		 Go to Step 10  Go to Step 8 
6
  1. Turn OFF the ignition.
  2. Disconnect the inoperative door latch assembly.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Door Open Switch parameter in the appropriate door module data list.
Does the scan tool indicate that the Door Open Switch parameter is CLOSED?		 Go to Step 11  Go to Step 7 
7 Test the door open switch signal circuit of the inoperative door latch assembly for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 12 
8 Test the courtesy lamp switch ON signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 13 
9 Test the courtesy lamp relay control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 14 
10 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 .
Did you find and correct the condition?		 Go to Step 20  Go to Step 15 
11 Inspect for poor connections at the harness connector of the inoperative door latch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 16 
12 Inspect for poor connections at the harness connector of the inoperative door control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 17 
13 Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 18 
14 Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 20  Go to Step 19 
15 Replace I/P dimmer switch. Refer to Instrument Panel Dimmer Switch Replacement .
Did you complete the replacement?		 Go to Step 20  -
16 Replace the inoperative door latch assembly. Refer to Front Side Door Lock Replacement or Rear Door Lock Replacement .
Did you complete the replacement?		 Go to Step 20  -
17 Replace the inoperative door control module. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 20  -
18 Replace the IPM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 20  -
19 Replace the RIM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 20  -
20 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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