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.
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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 277 (BODY CONTROL MODULES)SELF-DIAGNOSTIC SYSTEMLIGHTING SYSTEM DIAGNOSTIC CHECK
2004 Oldsmobile Bravada AWD
Lighting System Diagnostic Check
2004 Oldsmobile Bravada AWDSECTION Lighting System Diagnostic Check
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Connect scan tool to Data Link Connector (DLC). DLC is located below driver side of instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, perform TEST A: SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS.
- Turn ignition switch to RUN position. Using scan tool, attempt to establish communication with Driver Door Module (DDM), Dash Integration Module (DIM), Instrument Panel Cluster (IPC), Instrument Panel Module (IPM) and Rear Integration Module (RIM). If scan tool communicates with DDM, DIM, IPC, IPM and RIM, go to next step. If scan tool does not communicate with DDM, DIM, IPC, IPM and RIM, perform TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- Using scan tool, access CLASS 2 POWER MODE. Cycle ignition switch through all positions while observing ignition switch power mode parameter. If ignition switch parameter matches ignition switch positions, go to next step. If ignition switch parameter does not match ignition switch positions, perform TEST C: POWER MODE MISMATCH under SYSTEM TESTS.
- Using scan tool, select DISPLAY DTCs function for DDM, DIM, IPC, IPM and RIM. If scan tool displays any DTC, go to next step. If scan tool does not display any DTCs, repair lighting system by symptom. See appropriate EXTERIOR LIGHTS article.
- If scan tool does not display any DTCs which begin with "U", go to next step. If scan tool displays any DTCs which begin with "U", perform TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- If scan tool does not display DTCs B1000, B1004, B1007, B1009 or B1010, go to next step. If scan tool displays DTCs B1000, B1004, B1007, B1009 or B1010, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
- If scan tool displays DTCs B1327, perform appropriate test. See DTC B1327: BATTERY/SOURCE VOLTAGE LOW under DIAGNOSTIC TESTS in GENERATORS & REGULATORS - AURORA article in ELECTRICAL. If scan tool does not display DTCs B1327, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
CAUTION:
Engine may start. Turn ignition switch to OFF position as soon as you have observed crank power mode.
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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.