GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2007 🢒 G3 🢒 Body Systems 🢒 Lighting 🢒 Turn Signal Lamps and/or Indicators Inoperative

Turn Signal Lamps and/or Indicators Inoperative Hatchback

Step

Action

Values

Yes

No

1

Test fuses F3 and F14.

Is either fuse open?

--

Go to Step 2

Go to Step 3

2
  1. Test for a short circuit and repair, if necessary.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

3
  1. Turn ON the ignition, with the engine OFF.
  2. Measure the voltage at fuses F3 and F14.

Does the battery voltage available at both fuses F3 and F14 equal the specified value?

11-14 V

Go to Step 4

Go to Step 7

4
  1. Turn ON the hazard switch.
  2. Remove each of the inoperative lamps from its socket.
  3. Test each lamp socket positive terminal with a voltmeter.

Does the battery voltage pulsing at the turn signal hazard lamp socket positive terminal equal the specified value?

11-14 V

Go to Step 5

Go to Step 9

5

At each bulb socket, use an ohmmeter to test the ground circuit.

Does the ohmmeter indicate continuity?

--

Go to Step 6

Go to Step 8

6

Replace any faulty turn signal/hazard bulbs.

Is the repair complete?

--

System OK

--

7

Repair the power supply circuit to fuses.

Is the repair complete?

--

System OK

--

8

Repair the open ground wires.

Is the repair complete?

--

System OK

--

9
  1. Turn ON the hazard lamp switch.
  2. Test the blinker unit connector terminal 49a with a voltmeter.

Does the battery voltage pulsing at the blinker unit terminal 49a equal the specified value?

11-14 V

Go to Step 16

Go to Step 10

10
  1. Turn ON the hazard lamp switch.
  2. Test the blinker unit connector terminal 49 with a voltmeter.

Does the battery voltage available at the blinker unit terminal 49 equal the specified value?

11-14 V

Go to Step 11

Go to Step 14

11
  1. Disconnect the blinker unit from the connector.
  2. Use an ohmmeter to test between ground and the connector for terminal 31 of the blinker unit.

Does the ohmmeter indicate continuity?

--

Go to Step 13

Go to Step 12

12

Repair the blinker unit ground connection.

Is the repair complete?

--

System OK

--

13

Replace the faulty blinker unit.

Is the repair complete?

--

System OK

--

14
  1. Disconnect the hazard lamp switch connector.
  2. Measure the voltage at terminal 8.
  3. Turn ON the ignition, with the engine OFF.
  4. Measure the voltage at terminal 10.

Does the battery voltage available at both terminals equal the specified value?

11-14 V

Go to Step 15

Go to Step 19

15
  1. Remove the hazard lamp switch.
  2. Turn OFF the hazard lamp switch.
  3. Measure the continuity between terminals 7 and 10.
  4. Turn ON the hazard lamp switch.
  5. Measure the continuity between terminals 7 and 8.

Does the ohmmeter indicate continuity in both tests?

--

Go to Step 18

Go to Step 17

16
  1. Remove the hazard lamp switch.
  2. Turn the hazard lamp switch ON.
  3. Use an ohmmeter to measure the continuity between terminals 5, 6, and 9.

Does the ohmmeter indicate continuity between terminals 5, 6, and 9?

--

Go to Step 19

Go to Step 17

17

Replace the faulty hazard lamp switch.

Is the repair complete?

--

System OK

--

18

Repair the open circuit between the hazard lamp switch terminal 7 and the blinker unit terminal 49.

Is the repair complete?

--

System OK

--

19

Repair the open circuit between the hazard lamp switch and the fuses F3 or F14.

Is the repair complete?

--

System OK

--

Turn Signal Lamps and/or Indicators Inoperative Notchback

Step

Action

Values

Yes

No

1

Check fuses Ef15 and F4.

Is either fuse blown?

--

Go to Step 2

Go to Step 3

2
  1. Check for a short circuit and repair, if necessary.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

3
  1. Turn the ignition ON.
  2. Check the voltage at fuses Ef15 and F4.

Does the battery voltage available at both fuses Ef15 and F4 equal the specified value?

11-14V

Go to Step 4

Go to Step 7

4
  1. Turn the hazard switch ON.
  2. Remove each of the inoperative lamps from its socket.
  3. Test each lamp socket positive terminal with a voltmeter.

Does the battery voltage pulsing at the turn signal hazard lamp socket positive terminal equal the specified value?

11-14V

Go to Step 5

Go to Step 9

5

At each bulb socket, use an ohmmeter to check the ground circuit.

Is the resistance within the specified value?

<1.0 ohms

Go to Step 6

Go to Step 8

6

Replace any faulty turn signal/hazard bulbs.

Is the repair complete?

--

System OK

--

7

Repair the power supply circuit to fuses.

Is the repair complete?

--

System OK

--

8

Repair the open ground wires.

Is the repair complete?

--

System OK

--

9
  1. Turn on the hazard lamp switch.
  2. Test the blinker unit connector terminal 29a with a voltmeter.

Does the battery voltage pulsing at the blinker unit terminal 49a equal the specified value?

11-14V

Go to Step 15

Go to Step 10

10
  1. Turn on the hazard lamp switch.
  2. Test the blinker unit connector terminal 49 with a voltmeter.

Does the battery voltage available at the blinker unit terminal 49 equal the specified value?

11-14V

Go to Step 11

Go to Step 14

11
  1. Disconnect the blinker unit from the connector.
  2. Use an ohmmeter to check between ground and the connector for terminal 31 of the blinker unit.

Is the resistance within the specified value?

<1.0 ohms

Go to Step 13

Go to Step 12

12

Repair the blinker unit ground connection.

Is the repair complete?

--

System OK

--

13

Replace the faulty blinker unit.

Is the repair complete?

--

System OK

--

14
  1. Disconnect the hazard lam switch connector.
  2. Check for voltage at terminal 8.
  3. Turn the ignition on.
  4. Check for voltage at terminal 10.

Does the battery voltage available at both terminals equal the specified value?

--

Go to Step 15

Go to Step 19

15
  1. Remove the hazard lamp switch.
  2. Turn the hazard lamp switch off.
  3. Check for continuity between terminals 7 and 10.
  4. Turn the hazard lamp switch on.
  5. Check for continuity between terminals 7 and 8.

Is the resistance within the specified value?

<1.0 ohms

Go to Step 18

Go to Step 17

16
  1. Remove the hazard lamp switch.
  2. Turn the hazard lamp switch on.
  3. Use an ohmmeter to check for continuity between terminals 5, 6, and 9.

Is the continuity between terminals 5, 6, and 9 within the specified value?

<1.0 ohms

Go to Step 19

Go to Step 17

17

Replace the faulty hazard lamp switch.

Is the repair complete?

--

System OK

--

18

Repair the open circuit between the hazard lamp switch terminal 7 and the blinker unit terminal 49.

Is the repair complete?

--

System OK

--

19

Repair the open circuit between the hazard lamp switch and the fuses Ef15 or F4.

Is the repair complete?

--

System OK

--