GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the auxiliary power outlet operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

Verify that the auxiliary power outlet is inoperative.

Does the system operate normally?

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Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Inspect the AUX Power fuse in the right IP accessory wiring junction block for an open.

Is the fuse open?

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Go to Step 4

Go to Step 5

4

    • Use a DMM in order to test the auxiliary power outlet feed circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
    • Replace the AUX power fuse.

Did you find and correct a short to ground in the circuit?

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Go to Step 8

Go to Step 7

5

Use a test lamp in order to test the auxiliary power outlet ground circuit for a loose connection or an open. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct a loose connection or an open in the auxiliary power outlet ground circuit?

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Go to Step 8

Go to Step 6

6

Test for an open or a loose connection on the auxiliary power outlet feed circuit. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct an open or a loose connection in the auxiliary power outlet feed circuit?

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Go to Step 8

Go to Step 7

7

Replace the auxiliary power outlet.

Is the repair complete?

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Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Symptoms