The phrase “park light out” usually means one or more of your vehicle’s parking lights aren’t functioning. It’s typically caused by a blown bulb, a blown fuse, or an electrical fault, and it should be addressed promptly to stay visible and compliant with the law.
What are parking lights and what does the warning indicate?
Parking lights, also known as sidelights or park lamps, are the low-intensity exterior lights designed to make a parked vehicle visible at night or in low-light conditions and to meet regulatory requirements in some regions. A warning that they are out signals a failure in that lighting circuit, which can affect safety and legality, especially when driving in darkness or poor weather.
Common causes of a park light out
Several issues can trigger the warning. Common causes include the following:
- Burnt-out or faulty parking light bulb in the left or right lamp assembly.
- Blown fuse protecting the parking light circuit.
- Faulty parking light switch or a fault in the exterior lighting control module.
- In vehicles with LED or CANBUS lighting, using non-compatible bulbs can trigger a fault warning; may require CANBUS-compatible bulbs or resistors.
- In some models, a failing body control module or exterior lighting module can present as “park light out.”
If both sides are out, a central fuse or module issue is more likely; if only one side is out, a bulb or side-specific wiring fault is more likely.
In short, a park light out warning typically points to a simple bulb replacement, a blown fuse, or a localized wiring fault, but persistent or complex faults may require professional diagnosis.
Diagnosing and fixing the issue
To diagnose and fix the problem, follow these steps:
- Check the parking light bulbs on both sides. Replace any burnt bulbs with the correct type, and if you have LEDs, ensure they are CANBUS-compatible or use the recommended resistors if required.
- Inspect the fuses related to exterior lighting. Locate the exterior/parking light fuse in the fuse box and replace any that are blown; if a fuse keeps blowing, there may be a short or wiring problem.
- Examine wiring and connectors at the affected lamp(s) for corrosion, loose connections, or moisture. Re-seat connectors and repair damaged wires with appropriate automotive repair methods.
- Test the light switch and related relays. Ensure the parking light setting functions correctly and that the relay responsible for exterior lighting is operating.
- Consider the possibility of a vehicle-specific control module issue. Some cars require a dealer or qualified technician to diagnose with specialized tools.
- If the issue persists after these checks, have a professional diagnose the system with an appropriate scan tool to rule out CANBUS or module faults.
If you still see the warning after these steps, or if you’re unsure about performing the checks, seek professional help. Driving with non-working parking lights may be illegal in your area and reduces daytime visibility at night.
Safety and legal considerations
In many jurisdictions, functioning exterior lighting is a legal requirement when driving in low light, at dusk or dawn, or at night. Some places also require parking lights to be operable when the vehicle is parked on public roads. If one side is out or both sides fail, you should not rely on the vehicle’s parking lights until they are repaired. Always prioritize repair before long trips or night driving.
Summary
A “park light out” warning signals a fault in the parking light circuit, most often caused by a blown bulb, a blown fuse, or wiring/connectivity issues. Start with bulbs and fuses, then inspect wiring and connectors, and consider module or CANBUS-related problems for modern vehicles. If the issue persists, seek professional diagnosis to ensure safety and compliance with local laws.