GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Automatic Day/Night Mirrors System Check performed?

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Go to Step 2

Go to Automatic Day-Night Mirrors System Check

2

  1. Disconnect the LH outside rear view mirror connector.
  2. Connect a DMM from the LH outside rear view mirror connector cavity D to the automatic day-night 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 circuit repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

4

Connect a DMM from the LH outside rear view mirror connector cavity G to 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 circuit repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

6

Connect a DMM from the automatic day-night mirror connector cavity 4 to 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 from CKT 1690 (GRY) to CKT 1691 (PNK). Refer to Wiring Repairs in Wiring Systems.

Is the circuit complete?

--

Go to Automatic Day-Night Mirrors System Check

--

8

Replace the LH outside rear view mirror. Refer to Mirror Face Replacement - Outside Electrochromatic in Doors.

Is the LH outside rear view mirror replacement complete?

--

Go to Automatic Day-Night Mirrors System Check

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