GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Windows System Check?

--

Go to Step 2

Go to Power Windows System Check

2

Test for an open in CKT 164 from S500 to terminal C of the express down module.

Is CKT 164 OK?

--

Go to Step 3

Go to Step 6

3

Inspect for poor connections at the express down module terminal A and terminal C. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

Are there poor connections?

--

Go to Step 4

Go to Step 5

4

Repair the poor connections. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Windows System Check

--

5

Replace the express down module. Refer to Door Control Module Replacement .

Is the repair complete?

--

Go to Power Windows System Check

--

6

Repair the open in CKT 164. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Windows System Check

--