What does it mean?
B2482 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Combination Light Switch Signal Error .
Symptoms
- The right corner lamp stays lit when it should be off, or glows dimly all the time
- The corner lamp does not light when the indicator or steering angle should trigger it
- The module disables the output as protection and the lamp stops working entirely
- Other front lamps flicker as the module protects itself
- Battery drain if the lamp is fed permanently while the vehicle is parked
Likely causes
- Corner lamp output wire chafed against a live circuit inside the front headlamp loom
- Water and corrosion in the corner lamp connector bridging the output to an adjacent supply pin
- Incorrect bulb or an aftermarket LED unit feeding voltage back into the output
- Auxiliary driving lamps or a lighting kit spliced into the corner lamp wire
- Front loom damaged during front end body repair or bumper removal
- Insulation melted where the loom passes close to the headlamp housing
- Output driver in the lighting or body control module failed in the on state
How to fix it
- With everything switched off, check for voltage at the corner lamp output pin at the module, which confirms the feed is coming from outside the module
- Unplug the lamp and repeat the measurement to decide whether the source is the bulb holder or the harness
- Inspect the connector for corrosion and for a conductive bridge between the output and the adjacent supply pin
- Remove any aftermarket lamps or LED units and retest with the correct original bulb
- Trace the front loom for chafe damage against brackets and the headlamp housing, especially after body repair
- Repair the shorted section with a sealed joint and secure the loom clear of heat and sharp edges
- Replace the lighting module only when the unwanted voltage is still present with the harness disconnected downstream