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Turn Signal Lamps and/or Indicators Inoperative

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Turn Signal Lamps and/or Indicators Inoperative

Step Action Yes No
Schematic Reference:  Exterior Lights Schematics  
Connector End View Reference: Lighting Systems Connector End Views  or Body Control System Connector End Views in Body Control System.
1 Did you perform the Lighting Systems Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Lighting Systems 
2 Verify that the turn signal lamps and/or indicators are inoperative.
Do the turn signal lamps and/or indicators operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Are only the turn signal indicators in the instrument panel cluster (IPC) inoperative? Go to Step 4  Go to Step 5 
4 Test the inoperative turn signal supply voltage circuit to the IPC for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 21  Go to Step 13 
5 Is only one turn signal lamp inoperative? Go to Step 6  Go to Step 8 
6 Inspect the inoperative bulb/socket for an internal short, poor terminal contact, or an open filament.
Was a problem found?		 Go to Step 18  Go to Step 7 
7 Test for an open, high resistance, or short to ground in the turn signal lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 21  Go to Step 16 
8 Inspect the IGN E fuse and the FLASHER fuse.
Is either fuse open?		 Go to Step 11  Go to Step 9 
9 Test for an open or high resistance in the following circuits:
  • The turn/hazard flasher battery positive supply voltage
  • The turn/hazard flasher ground
  • The turn signal switch ignition 1 supply voltage

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 21  Go to Step 10 
10
  1. Disconnect the multifunction switch, turn signal switch.
  2. Test the multifunction turn signal switch for continuity between the multifunction turn signal switch ignition 1 voltage input terminal and the turn signal flasher signal output terminal in each respective position. Refer to Circuit Testing in Wiring Systems.
Is continuity present?		 Go to Step 12  Go to Step 14 
11 Test the following circuits for a short to ground:
  • The multifunction turn signal switch ignition 1 voltage
  • The turn/hazard flasher supply voltage
  • The left turn signal switch signal
  • The right turn signal switch signal
  • The left turn signal lamps supply voltage
  • The right turn signal lamps supply voltage
  • The trailer left rear turn/stop lamp supply voltage
  • The trailer right rear turn/stop lamp supply voltage

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 21  Go to Step 14 
12 Test the following circuits for an open or high resistance:
  • The multifunction turn signal switch ignition 1 voltage
  • The turn/hazard flasher supply voltage
  • The left turn signal switch signal
  • The right turn signal switch signal
  • The left turn signal lamps supply voltage
  • The right turn signal lamps supply voltage
  • The trailer left rear turn/stop lamp supply voltage
  • The trailer right rear turn/stop lamp supply voltage

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 21  Go to Step 15 
13 Inspect for poor connections at the IPC. 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 21  Go to Step 17 
14 Inspect for poor connections at 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 21  Go to Step 19 
15 Inspect for poor connections at the turn signal/hazard flasher module. 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 21  Go to Step 20 
16 Repair the ground circuit of the inoperative lamp. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 21  -
17
IMPORTANT: Perform the set up procedure for the IPC.
Replace the IPC. Refer toInstrument Panel Cluster (IPC) Replacement in Instrument Panel, Gages, and Console.Did you complete the repair?		 Go to Step 21  -
18 Replace or repair the inoperative bulb/socket.
Did you complete the repair?		 Go to Step 21  -
19 Replace the multifunction turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column.
Did you complete the repair?		 Go to Step 21  -
20 Replace the turn signal/hazard flasher module.
Did you complete the repair?		 Go to Step 21  -
21 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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