GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Navigation System Check performed?

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Go to step 2

Go to Navigation System Check

2

  1. Disconnect the Navigation Data Processor connector C2.
  2. Measure the voltage between cavity 18 of the Navigation Data Processor harness connector and ground with a DMM.

Is the voltage measured within the specified range?

0 V

Go to step 3

Go to step 4

3

Repair the short to B+ in circuit 814 between cavity 18 of the Navigation Data Processor connector and the Radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Navigation System Check

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4

Repair the open in circuit 814 between cavity 18 of the Navigation Data Processor connector and the Radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Navigation System Check

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