For 1990-2009 cars

## Stop Lamps Inoperative Hatchback

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
Notice: Do not insert test equipment probes (DVOM etc.) into any connector or fuse block terminal. The diameter of the test probes will deform most terminals. A deformed terminal will cause a poor connection, which will result in a system failure. Always use the J-35616 GM-Approved Terminal Test Kit in order to front probe terminals. Do not use paper clips or other substitutes to probe terminals. When using the J-35616 GM-Approved Terminal Test Kit, ensure the terminal test adapter choice is the correct size for the connector terminal. Do not visually choose the terminal test adapter because some connector terminal cavities may appear larger than the actual terminal in the cavity. Using a larger terminal test adapter will damage the terminal. Refer to the J-35616 GM-Approved Terminal Test Kit label on the inside of the J-35616 GM-Approved Terminal Test Kit for the correct adapter along with the connector end view for terminal size.
1 | Test fuse F13. Is fuse F13 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 | Use a voltmeter to measure the voltage at fuse F13. Is the voltage at fuse F13 equal to the specified value? | 11-14 V | Go to Step 5 | Go to Step 4
4 | Repair the power supply circuit for fuse F13. Is the repair complete? | -- | System OK | --
5 |

1. Press the brake pedal.
2. Test the positive terminals of the bulb sockets with a test lamp.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 8

6 | Connect an ohmmeter between the ground and the stop lamp ground terminal. Does the ohmmeter indicate continuity? | -- | Go to Step 8 | Go to Step 7
7 | Repair the ground circuit. Is the repair complete? | -- | System OK | --
8 |

1. Disconnect the wiring connector from the brake switch.
2. Press the brake pedal.
3. Use an ohmmeter to measure the continuity between terminals 4 and 1.

Does the ohmmeter indicate continuity?

--

Go to Step 10

Go to Step 9

9 | Replace the stop lamp switch. Is the repair complete? | -- | System OK | --
10 |

1. Disconnect the stop lamp switch electrical connector.
2. Measure the voltage at terminal 4.

Does the voltmeter show the specified value?

11-14 V

Go to Step 12

Go to Step 11

11 | Repair the open circuit between the fuse F13 and the brake switch. Is the repair complete? | -- | System OK | --
12 | Repair the open circuit between the brake switch and the stop lamps. Is the repair complete? | -- | System OK | --