For 1990-2009 cars

## Power Mirrors Inoperative Without A43

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Power Mirror System Check? | -- | Go to Step 2 | Go to Outside Mirrors System Check
2 | Use a digital multimeter (DMM) in order to backprobe across 1 of the following power mirror switch terminals and ground:

• | Terminal E (Oldsmobile)

• | Terminal H (Buick)

• | Terminal A (Pontiac)

Does the voltage measure within the specified range?

10-15 V

Go to Step 3

Go to Step 5

3 | Use a DMM in order to backprobe across the following appropriate power mirror switch terminals:

• | Terminal E and terminal D (Oldsmobile)

• | Terminal H and terminal A (Buick and Pontiac)

Does the voltage measure within the specified range?

10-15 V

Go to Step 4

Go to Step 6

4 | Replace the power mirror switch. Refer to one of the following procedures:

• | Power Mirror Switch Replacement

• | Power Mirror Switch Replacement

Is the repair complete?

--

Go to Outside Mirrors System Check

--

5 | Repair the open or short to ground in CKT 640 (ORN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Outside Mirrors System Check | --
6 | Repair the open in CKT 1250 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Outside Mirrors System Check | --

## Power Mirrors Inoperative With A43

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Memory Mirror System Check? | -- | Go to Step 2 | Go to Outside Mirrors System Check
2 |

1. Set the ignition switch to the OFF position.
2. Ground the memory seat diagnostic connector.

• | The connector may be taped up into the body harness.

• | The module beeps once in order to acknowledge entrance into the mode 1 diagnostics.

• | Refer to Memory Seat Operation in Seats for a detailed explanation of the memory seat/mirror module diagnostic modes.

3. Operate the power mirror switch in all directions. (The module beeps once for each received switch input.)
4. Any time a switch is operated and the module does not beep, the module did not receive an input from that switch.

Were there any switch operations where the memory seat/mirror module beeped?

--

Go to Power Mirrors Inoperative in Left/Right Direction - One

Go to Step 3

3 |

1. Disconnect the power mirror switch connector.
2. Measure the voltage to ground from the power mirror switch connector terminal E.

Does the voltage measure within the specified range?

10-15 V

Go to Step 4

Go to Step 7

4 | Measure the voltage between the following power mirror switch connector terminals:

• | Terminal E

• | Terminal D

Does the voltage measure within the specified range?

10-15 V

Go to Step 5

Go to Step 8

5 | Test the following circuit for an open:

• | CKT 1516 (LT BLU) left

• | CKT 1831 (GRY) right

Is CKT 1516 or CKT 1831 OK?

--

Go to Step 6

Go to Step 9

6 | Replace the power mirror switch. Refer to one of the following procedures:

• | Power Mirror Switch Replacement

• | Power Mirror Switch Replacement

Is the repair complete?

--

Go to Outside Mirrors System Check

--

7 | Repair the open or short to ground in CKT 640 (ORN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Outside Mirrors System Check | --
8 | Repair the open in CKT 1250 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Outside Mirrors System Check | --
9 | Repair the open in one of the following circuits:

• | CKT 1516 (LT BLU). Refer to Wiring Repairs in Wiring Systems.

• | CKT 1831 (GRY). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--