- Faulty wiring: The wiring connecting the trailer to the towing vehicle may be damaged or loose, causing the trailer tail lights to malfunction. Check the wiring for any visible damage or corrosion, and ensure all connections are secure.
- Blown fuse: The fuse for the trailer tail lights may have blown, interrupting power supply to the lights. Check the fuse box of the towing vehicle and replace the blown fuse if necessary.
- Malfunctioning brake light switch: The brake light switch on the towing vehicle may be faulty, preventing the tail lights from receiving the signal to illuminate when the brake pedal is pressed. Test the brake light switch by pressing the brake pedal and observing if the brake lights on the towing vehicle illuminate. If they do not, the brake light switch may need to be replaced.
- Damaged trailer tail light bulbs: The tail light bulbs on the trailer may be damaged or burnt out, causing them to not illuminate when the brake pedal is pressed. Check the tail light bulbs and replace any that are damaged or not working.
If you are unsure about troubleshooting and fixing the issue yourself, it is recommended to consult with a qualified mechanic or electrician to diagnose and repair the problem.
