GM Service Manual Online
For 1990-2009 cars only

B+

Action

Value(s)

Yes

No

Important: This diagnostic procedure is for an inoperative RF window from the LF switch only. The RF window should still operate from the RF power window switch. If these exact conditions do not exist, refer to Symptoms

1

Did you review power windows operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

  1. Turn the ignition switch to the RUN position.
  2. Check for B+ with DMM from cavities B and D connector C2 of the LF power window master switch to ground while toggling the RF power window switch portion of the master switch.

Is B+ present in both switch positions?

B+

Go to Step 4

Go to Step 3

3

Replace LF power window master switch. Refer to Power Accessory Switch Panel Replacement

Is the repair complete?

--

Go to Step 5

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4

Repair OPEN/SHORT in one/both of the following circuits;

    • CKT 166 (LT BLU)
    • CKT 167 (TAN)

Is the repair complete?

--

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2