B2529: Left Rear Turn Signal Circuit Malfunction
The B2529 code indicates that the Body Control Module (BCM) has detected a fault in the left rear turn signal circuit. This typically means an open circuit, a short to ground or battery, or abnormal resistance in the wiring or bulb, preventing the left rear turn signal from operating correctly.
1. Commonly Affected Makes
2. Most Common Causes
- Blown or incorrect type left rear turn signal bulb
- Open or shorted wiring in the left rear turn signal circuit
- Corroded, loose, or damaged left rear bulb socket connector
- Failed BCM internal output driver for the left rear turn signal
- Blown fuse for the turn signal/hazard light circuit
3. Symptoms You Will Notice
- Left rear turn signal does not flash
- Left rear turn signal flashes rapidly (hyperflash)
- Turn signal indicator on the dashboard may flash rapidly or not at all
4. Step-by-Step Diagnosis
Check the left rear turn signal bulb for being burned out or incorrect type; replace if necessary.
Inspect the left rear bulb socket and wiring for corrosion, damage, or loose connections.
Test the turn signal circuit for voltage, ground, and continuity using a multimeter.
Check the turn signal/hazard fuse and replace if blown.
If all else is okay, suspect a faulty BCM and perform further diagnostics or replacement.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, but it is not recommended because the missing turn signal reduces visibility to other drivers, increasing the risk of an accident. Have it repaired as soon as possible.
How much does it cost to fix?▼
Typically between $50 and $200 for bulb or socket replacement, or up to $500-$800 if the BCM needs replacement.