Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Testing
2004 Oldsmobile Bravada RWDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connectors at the accessory AC/DC power control module.
- Ignition OFF and the scan tool disconnected, open and close the driver door and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 1 X2 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 X2 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Test for less than 1.0 volt between each appropriate control circuit terminal listed below and ground:
- Control terminal 2 X1.
- Control terminal 4 X1.
- Control terminal 6 X1.
- If greater than the specified value, test the appropriate circuit for a short to voltage. If the circuit tests normal, test or replace the accessory power outlet.
- Test for infinite resistance between each appropriate control module circuit terminal listed below and ground:
- Control terminal 2 X1.
- Control terminal 4 X1.
- Control terminal 6 X1.
- If less than the specified value, test the appropriate circuit for a short to ground.
- Ignition OFF, test for less than 5 ohms between the accessory power outlet line circuit terminal and the accessory AC/DC power control module terminal listed below:
- The line hot circuit terminal 3 and the accessory AC/DC power control module terminal 4 X1.
- The line neutral circuit terminal 6 and the accessory AC/DC power control module terminal 6 X1.
- If greater than the specified range, test the appropriate line circuit for an open/high resistance. If the circuit tests normal, test or replace the accessory power outlet.
- Disconnect the harness connector at the accessory power outlet.
- Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 4 and ground.
- If the test lamp does not illuminate, test the ignition voltage circuit for an open/high resistance.
- Connect the harness connector at the accessory power outlet.
- Connect an AC-powered device to the accessory power outlet.
- Ignition ON, verify that a test lamp illuminates between the accessory AC/DC power control module signal circuit terminal 2 X1 and ground.
- If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the accessory power outlet.
- If all circuits test normal, replace the accessory AC/DC power control module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.