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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting Systems (Symptoms) >> Park Lamps Inoperative

Park Lamps Inoperative

Park Lamps Inoperative

Step Action Yes No
Schematic Reference:  Exterior Lights Schematics 
Connector End View Reference:  Master Electrical Component List 
1 Did you perform the Lighting System Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Lighting Systems
2
  1. Turn OFF the ignition.
  2. Observe the park lamps.
  3. Turn the park lamps ON and OFF.
Do the park lamps operate properly?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Turn ON the park lamps.
  4. With the scan tool, observe the Park Lamp Switch parameter in the dash integration module (DIM) Inputs data list.
Does the data parameter display ON?		 Go to Step 4  Go to Step 5 
4
  1. Expose the sunload sensor assembly to a bright light.
  2. Wait more than 20 seconds.
  3. Turn OFF the park lamps.
  4. With a scan tool, command the parking lamps relay ON and OFF from the DIM Special Functions, Output Control data list.
Did all of the park lamps turn ON and OFF?		 Go to Step 18  Go to Step 6 
5
  1. Turn OFF the ignition.
  2. Disconnect the multifunction, turn signal switch.
  3. Connect a 3-amp fused jumper between the park lamp switch ON signal circuit of the multifunction, turn signal switch and the ground circuit of the multifunction, turn signal switch.
  4. Turn ON the ignition, with the engine OFF.
Does the park lamp switch input data parameter display ON?		 Go to Step 16  Go to Step 14 
6
  1. Turn OFF the ignition.
  2. Disconnect the park lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems.
  3. Connect a test lamp between the park lamp relay control side supply voltage circuit and a good ground.
  4. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?		 Go to Step 7  Go to Step 12 
7 Connect a test lamp between the park lamp relay switch side supply voltage circuit and a good ground.
Does the test lamp illuminate?		 Go to Step 8  Go to Step 21 
8
  1. Turn OFF the ignition.
  2. Connect a test lamp between the park lamp relay control circuit of the park lamp relay and the park lamp relay coil side supply voltage circuit of the park lamp relay.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool command the parking lamps relay ON and OFF.
Did the test lamp turn ON and OFF?		 Go to Step 9  Go to Step 13 
9
  1. Turn OFF the ignition.
  2. Connect a 30-amp fused jumper between the park lamp relay switch side supply voltage circuit of the park lamp relay and the park lamp supply voltage circuit of the park lamp relay.
  3. Turn ON the ignition, with the engine OFF.
Did all of the park lamps illuminate?		 Go to Step 17  Go to Step 10 
10
  1. Disconnect the inoperative park lamp bulb.
  2. Connect a test lamp between the park lamp supply voltage circuit of the inoperative park lamp bulb and ground circuit inoperative park lamp bulb.
Does the test lamp illuminate?		 Go to Step 19  Go to Step 11 
11 Test the park lamp supply voltage circuit for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 26  Go to Step 20 
12 Test the coil side supply voltage circuit of the park lamp relay for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 26  Go to Step 18 
13 Test the park lamp relay control circuit of the park lamp relay for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 26  Go to Step 18 
14 Test the ground circuit of the multifunction, turn signal switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 26  Go to Step 15 
15 Test the park lamp switch on signal circuit of the multifunction, turn signal switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 26  Go to Step 18 
16 Inspect for poor connections at the harness connector of the multifunction, turn signal 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 26  Go to Step 22 
17 Inspect for poor connections at the park lamp relay. 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 26  Go to Step 23 
18 Inspect for poor connections at the harness connector of the DIM. 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 26  Go to Step 24 
19 Inspect for poor connections at the inoperative park lamp bulb. 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 26  Go to Step 25 
20 Repair the open or high resistance in the park lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 26  -
21 Repair the high resistance or open in the switch side supply voltage circuit of the park lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 26  -
22 Replace the multifunction, turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column.
Did you complete the replacement?		 Go to Step 26  -
23 Replace the park lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems.
Did you complete the replacement?		 Go to Step 26  -
24
IMPORTANT: After replacement perform the setup procedure for the DIM.
Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System.Did you complete the replacement?		 Go to Step 26  -
25 Replace the inoperative park lamp bulb.
Did you complete the replacement?		 Go to Step 26  -
26 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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