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 MANUALSBUICK2000PARK AVENUE BASE, 3.8 1REPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEMSYMPTOM TESTSTEST 4: LIGHTS INOPERATIVE IN CTD ALARM MODE
2000 Buick Park Avenue Base, 3.8 1
Test 4: Lights Inoperative In CTD Alarm Mode
2000 Buick Park Avenue Base, 3.8 1SECTION Test 4: Lights Inoperative In CTD Alarm Mode
- Check exterior lights. If lights are okay, go to next step. If lights do not operate properly, diagnose and repair exterior light circuit. See EXTERIOR LIGHTS article.
- Check for open in Black/White wire between RFA module terminal B4 and instrument panel fuse block connector C4, terminal B6. See Figure . If circuit is open, go to next step. If circuit is okay, go to step 4 .
- Repair Black/White wire between RFA module terminal B4 and instrument panel fuse block connector C4, terminal B6. Recheck system operation.
- Check for open in Black/White wire between Lighting Control module (LCM) connector C2, terminal B12 and instrument panel fuse block connector C1, terminal B7. If circuit is open, repair as necessary and retest. If circuit is okay, go to next step.
- Check for open in instrument panel fuse block circuit between connector C1, terminal B7 and connector C4, terminal B6. If fuse block is open, go to next step. If fuse block is okay, go to step 7 .
- Replace instrument panel fuse block. Recheck system operation.
- Connect a 3-amp fused jumper wire between LCM harness connector C2, terminal B12 (Black/White wire) and ground. If headlights turn on, go to next step. If headlights do not turn on, go to step 9 .
- Replace RFA module. See REMOTE FUNCTION ACTUATOR MODULE under REMOVAL & INSTALLATION. Recheck system operation.
- Replace Lighting Control module (LCM). Recheck system operation.
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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.