GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Interior Lamps System Check?

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Go to Step 2

Go to Interior Lamps System Check

2

  1. Disconnect the right vanity mirror lamp connector.
  2. Use a J 39200 DMM in order to measure the resistance between terminal B of the vanity mirror lamp and ground.

Does the resistance measure within the specified range?

0-2 ohms

Go to Step 3

Go to Step 4

3

Use the J 39200 DMM in order to measure the voltage between terminal A of the vanity mirror lamp connector and ground.

Does the voltage measure to the specified value?

B+

Go to Step 5

Go to Step 6

4

Repair the open in CKT 750 between the right vanity mirror lamp and ground splice pack G401. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

--

5

Replace the right vanity mirror lamp. Refer to Sunshade Replacement in Interior Trim.

Is the repair complete?

--

Go to Interior Lamps System Check

--

6

Use the J 39200 DMM in order to backprobe the left IP junction block connector C3. Measure the voltage between terminal C4 and ground.

Does the voltage measure to the specified value?

B+

Go to Step 7

Go to Step 8

7

Repair the open in CKT 1732 between the left IP junction block and the right vanity mirror lamp. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

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8

Replace the left IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

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