What does it mean?
B2519 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Turn Signal LH Rear Open Circuit .
Symptoms
- No flashing from the left rear indicator
- Rapid flash rate and fast clicking whenever the left indicator is used
- Left rear does not flash with the hazard lights either
- Bulb-out warning shown in the cluster, sometimes only after the lights are switched on
- Signal works intermittently over rough roads
- Other drivers not seeing the turn intention from behind on that side
Likely causes
- Blown left rear turn signal bulb or a bulb loose in its socket after vibration
- Corroded socket in the rear lamp housing, often after water has been sitting in it
- Broken wire in the loom that flexes through the trunk lid or rear door hinge
- Loss of the rear lamp ground point behind the trim, which is usually a bolt corroded to the body
- Trailer socket wiring left disconnected or damaged, breaking the rear lamp feed
- Failed LED rear lamp module on the left side
- Terminal pushed out of the rear lamp connector during a previous repair
How to fix it
- Check the bulb first and look for a blackened or broken filament and a loose fit in the socket
- Clean or replace the socket if the contacts are green, pitted or spread apart
- Verify the lamp ground: measure voltage drop between the lamp ground pin and the body with the lamp on
- Back-probe the feed wire for the flashing voltage pulse; no pulse means an open in the harness or the module output
- Flex the harness at the hinge or grommet while checking continuity to catch a broken strand
- Disconnect any trailer harness and confirm the fault stays or goes away with it removed
- After the repair, clear the code and check that both sides flash at the same rate