Hi,
Observed Problem:
- When the vehicle is OFF and a door is opened, the dash illumination and parking lights may begin to flicker ON/OFF.
- A warning message appears on the dash: "TURN LIGHTS OFF".
- Once the abnormal behavior starts, it repeats every time a door is opened during that event until it stops automatically.
- Each episode lasts approximately 30-40 seconds, then the system returns to normal.
- The abnormal behavior itself appears randomly / intermittently.
Relevant History:
- An LED bulb had been installed in the center dome light for a long period prior to the issue, without previous problems.
- At a later time, the LED dome light began to remain ON in automatic (door) mode, even when it should have turned OFF.
- At the same time, opening a door caused the dash illumination and parking lights to activate abnormally every time the door was opened.
- The LED dome bulb was then replaced with a halogen bulb, after which the abnormal behavior resolved completely.
- Subsequently, fog lights were installed using a relay and fused battery supply.
- After continued vehicle use, the same type of dash and parking light behavior has reappeared intermittently when opening a door, despite the dome light now using a halogen bulb.
Fog Light Wiring Information:
- Fog lights are wired using a relay-based configuration:
†Terminal 30: Battery positive (fused)
†Terminal 85: Chassis ground
†Terminal 86: Trigger signal
†Terminal 87: Output to fog lights
Important Characteristics:
- The abnormal behavior is initiated only by opening a door (courtesy-light activation).
- It can continue even after the door is closed until the event times out.
- All other vehicle systems operate normally (driving, locking, windows, charging).
- No permanent warning lights or stored fault codes are present.
Questions for Professional Diagnosis:
- Which systems or circuits should be inspected to identify the cause of intermittent dash and parking light activation when opening a door with the vehicle OFF?
- could be bad type cheap relay, or the cheap aftermarket fog led
- What diagnostic steps would you recommend to isolate the source of this condition, given its intermittent nature?
- Are there known checks or service bulletins related to courtesy-light or lighting-control behavior on this model?
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Wednesday, December 24th, 2025 AT 9:38 AM
(Merged)