Turn Signal Lamps and/or Indicators Inoperative

Step	Action	Yes	No
Schematic Reference: Exterior 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	Turn ON the ignition, with the engine OFF. Place the turn signal lever in the LEFT turn position. Place the turn signal lever in the RIGHT turn position. Do the appropriate turn signal lamps and/or indicators illuminate for each action?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Is only one turn signal lamp inoperative?	Go to Step 6	Go to Step 4
4	Is only one of the turn signal indicators inoperative?	Go to Step 5	Go to Step 7
5	Turn OFF the ignition. Disconnect the instrument panel cluster (IPC). Refer to Instrument Panel Cluster (IPC) Replacement (Pontiac) or Instrument Panel Cluster (IPC) Replacement (Chevrolet) in Instrument Panel, Gages, and Console. Turn ON the ignition, with the engine OFF. Probe the inoperative turn signal supply voltage circuit of the IPC with a test lamp that is connected to a good ground. Place the turn signal lever in the position of the inoperative indicator. Does the test lamp illuminate and flash?	Go to Step 10	Go to Step 13
6	Disconnect the inoperative turn signal lamp. Probe the turn signal supply voltage circuit of the inoperative lamp with a test lamp that is connected to a good ground. Place the turn signal lever in the position of the inoperative lamp. Does the test lamp illuminate and flash?	Go to Step 14	Go to Step 15
7	Do the hazard lamps operate properly?	Go to Step 8	Go to Hazard Lamps Inoperative
8	Disconnect the turn/hazard headlamp switch. Probe the turn signal flasher signal circuit with a test lamp that is connected to a good ground. Does the test lamp illuminate and flash?	Go to Step 11	Go to Step 9
9	Test the turn signal flasher signal circuit for an open, high resistance, or short to ground. Refer to Circuit Testing andWiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 12
10	Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections andConnector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 16
11	Inspect for poor connections at the harness connector of the turn/hazard headlamp 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 19	Go to Step 17
12	Inspect for poor connections at the harness connector of the turn/hazard flasher. 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 19	Go to Step 18
13	Repair an open, high resistance, or short to ground in the inoperative turn signal supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 19	-
14	Repair an open or high resistance in the ground circuit of the inoperative lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 19	-
15	Repair an open, high resistance, or short to ground in the inoperative turn signal supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 19	-
16	Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	Go to Step 19	-
17	Replace the turn/hazard headlamp switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement?	Go to Step 19	-
18	Replace the turn/hazard flasher. Did you complete the replacement?	Go to Step 19	-
19	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3