1. Check the Fuses: This is the easiest and most common cause. Your owner's manual will show you the fuse box location (usually under the hood or inside the cabin) and which fuse(s) control the parking lights. Check for blown fuses (a broken filament inside). Replace any blown fuses with fuses of the *same amperage rating*.
2. Bulbs: A burnt-out bulb in one or more parking light locations (front and rear) could cause the whole system to act strangely, depending on the vehicle's wiring. Visually inspect all the parking light bulbs. Replace any that are burnt out with the correct type of bulb.
3. Switch: The parking light switch itself could be faulty. This switch is usually located on the steering column. It's difficult to test without specialized tools, but if you've checked fuses and bulbs, this is a possibility. Replacement might be necessary.
4. Wiring: Damaged or corroded wiring is another culprit. Check the wiring harness leading to and from the parking lights, looking for any broken wires, frayed insulation, or corrosion. Pay special attention to the connections at the bulbs and the switch. Repair or replace any damaged wiring. This requires some electrical knowledge and might involve soldering.
5. Multi-Function Switch (likely if other lights are affected): If other lights controlled by the steering column switch (like turn signals, headlights) are malfunctioning, then the problem is *likely* in the multi-function switch itself. This is more involved to repair and often requires replacement by a qualified mechanic.
6. Grounding Issues: A poor ground connection can cause erratic electrical behavior. Check the ground points for the parking light circuit and ensure good contact. Cleaning corrosion from these points can sometimes solve the issue.
7. BCM (Body Control Module): In some rare cases, a faulty Body Control Module can cause problems with the lighting system. This is a more advanced issue and requires diagnostic tools and potentially replacement by a professional.
Troubleshooting Steps:
1. Start with the fuses. This is the quickest and easiest check.
2. Check the bulbs. Visually inspect all front and rear parking lights.
3. Inspect the wiring. Look for any obvious damage.
4. If other lights are also malfunctioning, suspect the multi-function switch.
5. Consider the BCM only as a last resort after checking everything else.
If you're not comfortable working with car electrical systems, take your Aztek to a qualified mechanic. They have the tools and expertise to diagnose the problem accurately and make the necessary repairs. Remember safety first—always disconnect the battery's negative terminal before working on your car's electrical system.
