B2487: Right Front Repeater Lamp Short to Battery
The Body Control Module (BCM) or Lighting Control Module (LCM) has detected a short circuit to battery voltage on the output circuit for the right front (RF) side repeater lamp. This means the lamp's power wire is making contact with a constant 12V source, preventing the module from controlling the lamp via PWM or switched output. The fault may cause the lamp to stay on continuously or blow the protection fuse.
1. Commonly Affected Makes
2. Most Common Causes
- Wiring harness for the RF repeater circuit chafed or pinched against a constant B+ wire
- Damaged RF repeater lamp connector with internal pin short circuit
- RF repeater lamp or internal LED module shorted to positive voltage
- Internal output driver failure in the BCM/LCM (less common)
3. Symptoms You Will Notice
- Right front side repeater lamp stays on constantly
- Blown fuse for the side repeater circuit
- Inoperative right front side repeater lamp
4. Step-by-Step Diagnosis
Visually inspect the RF repeater lamp wiring for chafing or pinching against metal or other wires
Disconnect the RF repeater lamp and check for short to battery on the power wire using a multimeter
Test the lamp connector for internal short between pins
If wiring and lamp are good, suspect a faulty BCM/LCM output driver
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, but the fault may cause the lamp to stay on or blow a fuse, which could lead to an inoperative turn signal. It's best to repair promptly to avoid electrical issues.
How much does it cost to fix?▼
Typically $100-$300 for wiring repair or lamp replacement; BCM replacement can cost $500-$1000.