GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Automatic Day/Night Mirrors System Check performed?

--

Go to Step 2

Go to Automatic Day-Night Mirrors System Check

2

  1. Turn the ignition switch to the RUN position.
  2. Connect a J 39200 digital multimeter (DMM) between the inside rear view mirror connector cavity 1 and ground. Refer to Measuring Voltage in Wiring Systems.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 3

3

Repair the open in CKT 39 (PNK). 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 DMM between cavity 1 (PNK) and cavity 2 (BLK/WHT) of the inside rear view mirror connector. Refer to Measuring Voltage in Wiring Systems.

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 5

5

Repair the open in CKT 351 (BLK/WHT). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

6

With the shift lever in PARK, connect the J 39200 DMM between the inside rear view mirror connector cavity 3 (LT GRN) and ground. Refer to Measuring Voltage in Wiring Systems.

Is the voltage within the specified range?

10-15 V

Go to Step 7

Go to Step 8

7

  1. Remove the park/neutral position switch.
  2. Connect the J 39200 DMM between the inside rear view mirror connector cavity 3 (LT GRN) and ground. Refer to Measuring Voltage in Wiring Systems.

Is the voltage within the specified range?

10-15 V

Go to Step 8

Go to Step 9

8

Repair the short to B+ in CKT 24 (LT GRN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

9

Replace the inside rear view mirror. Refer to Inside Rearview Mirror Replacement .

Is the automatic day-night mirror replacement complete?

--

Go to Automatic Day-Night Mirrors System Check

--

10

Replace the park/neutral position switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transaxle - 4T65-E.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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