GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Has the Garage Door Opener System Check been performed?

--

Go to Step 2

Go to Garage Door Opener System Check

2

  1. Disconnect connector C307.
  2. Connect a test lamp between connector C307 cavity A 40 (ORN) wire and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 5

3

Connect a test lamp between connector C307 cavity B wire 150 (BLK) and B+.

Does test lamp light?

--

Go to Step 4

Go to Step 6

4

Replace the garage door opener. Refer to Garage Door Opener Module Replacement .

Is the repair complete?

--

Go to Garage Door Opener System Check

--

5

Locate and repair open in CKT 40 (ORN) between garage door opener and the IP fuse block.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Garage Door Opener System Check

--

6

Locate and repair open in CKT 150 (BLK) between the garage door opener and G400.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Garage Door Opener System Check

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