GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Block the wheels or set the parking brake.
  2. Turn the ignition switch to the ON position. Do not start the engine.
  3. Disconnect the backup lamp switch (M/T) or the park/neutral position switch (A/T).

Do the backup lamps turn OFF?

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Go to Step 3

Go to Step 4

3

Replace or adjust the backup lamp switch (M/T) or the park/neutral position switch (A/T).

Is the repair complete?

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System OK

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4

Repair the short to power in the Back-up Lamp Feed circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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System OK

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