GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Automatic Day/Night Mirrors System Check?

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Go to Step 2

Go to Automatic Day-Night Mirrors System Check

2

  1. Disconnect the left outside mirror connector.
  2. Connect a J 39200 digital multimeter (DMM) between the left outside mirror connector (cavity E (GRY) w/ A45, or cavity A (GRY) w/o A45), and the inside rear view mirror connector cavity 4. Refer to Testing for Continuity in Wiring Systems.

Is the resistance less than the specified value?

5 ohms

Go to Step 4

Go to Step 3

3

Repair the open in CKT 1690 (GRY). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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4

Connect the J 39200 digital multimeter (DMM) between the left outside mirror connector (cavity F (PNK) w/ A45, or cavity B (PNK) w/o A45), and cavity 5. Refer to Testing for Continuity in Wiring Systems.

Is the resistance less than the specified value?

5 ohms

Go to Step 6

Go to Step 5

5

Repair the open in CKT 1691 (PNK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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6

Connect the J 39200 digital multimeter (DMM) between the inside rear view mirror connector cavity 4 and cavity 5. Refer to Testing for Continuity in Wiring Systems.

Is the resistance less than the specified value?

5 ohms

Go to Step 7

Go to Step 8

7

Repair the short between CKT 1690 (GRY) and CKT 1691 (PNK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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8

Replace the left outside mirror. Refer to Inside Rearview Mirror Replacement .

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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