GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The LH power mirror does not move left and right. The RH power mirror moves as commanded.

1

Was the Power Door System Diagnostic System Check performed?

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Go to step 2

Go to Diagnostic System Check - Power Door Systems

2

  1. Disconnect the LH front door module connector C4.
  2. Connect a fused jumper from battery positive voltage (B+) to the LH front door module harness connector C4 terminal 6.
  3. Connect a fused jumper from ground to the LH front door module harness connector C4 terminal 7.

Does the motor run?

--

Go to Step 3

Go to Step 4

3

Replace the LH front door module. Refer to Door Control Module Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check - Power Door Systems

--

4

Reverse the connections at LH front door module harness connector C4 terminals 6 and 7.

Does the motor run?

--

Go to Step 3

Go to Step 5

5

Test CKT 82 (WHT) for an open or a short to ground.

Is the circuit OK?

--

Go to Step 6

Go to Step 7

6

Test CKT 81 (DK BLU) for an open or a short to ground.

Is the circuit OK?

--

Go to Step 8

Go to Step 9

7

Repair the open or the short to ground in CKT 82 (WHT). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

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8

Replace the LH power mirror horizontal motor. Refer to Power Mirror Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check - Power Door Systems

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9

Repair the open or the short to ground in CKT 81 (DK BLU). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

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