What Does B2480 Mean?
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected an electrical short to battery voltage in the left front corner lamp output circuit. The BCM monitors the lamp circuit and has detected voltage present when it should not be, typically indicating damaged wiring or a component failure that is allowing constant battery power to reach the lamp circuit. This condition can cause the lamp to stay illuminated continuously and may drain the battery or damage electrical components.
Common Causes
45%
Damaged or chafed wiring harness causing short to power wire in left front corner lamp circuit
30%
Failed left front corner lamp socket with internal short to battery voltage
15%
Corroded or damaged connector terminals at BCM or lamp allowing cross-circuit short
10%
Failed Body Control Module with internal driver circuit malfunction
Diagnostic Steps
1
Step 1: Perform visual inspection of left front corner lamp assembly, socket, wiring harness, and all connectors for signs of damage, melting, corrosion, or chafing. Pay special attention to areas where harness routes near sharp metal edges or moving components.
2
Step 2: Disconnect the left front corner lamp connector and measure voltage at the lamp side connector with ignition on and lamps commanded off. Should read 0 volts; battery voltage indicates short to power between BCM and lamp connector.
3
Step 3: With lamp disconnected, use a multimeter to check resistance between the lamp output wire and battery positive at the BCM connector (BCM disconnected). Reading of less than 10,000 ohms confirms short to battery voltage in the harness.
4
Step 4: If harness tests good, inspect lamp socket for signs of internal short, melted terminals, or moisture intrusion. Test socket resistance to ground with bulb removed; infinite resistance expected.
5
Step 5: If all external components test normal, reconnect all components except BCM and measure voltage/resistance at BCM connector lamp output pin. Presence of battery voltage indicates harness short; absence suggests BCM internal fault.
6
Step 6: After repairs, clear codes, cycle lamp operation multiple times, and verify proper on/off function. Road test vehicle and confirm no code return and proper lamp operation in all conditions.
Estimated Repair Cost
$75 - $650
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected an electrical short to battery voltage in the left front corner lamp output circuit. The BCM monitors the lamp circuit and has detected voltage present when it should not be, typically indicating damaged wiring or...
The most common cause of B2480 (LF CORNER LAMP OUTPUT Ckt Short to Battery) is: Damaged or chafed wiring harness causing short to power wire in left front corner lamp circuit
Typical repair costs for B2480 range from $75 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive, but the left front corner lamp may not function properly which can reduce visibility to other drivers during turns or parking maneuvers. The short circuit may also drain the battery if left unrepaired and could potentially cause additional electrical component damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2480 to identify the root cause.
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Quick Info
Category
Body
System
Body Electrical/Exterior Lighting System
Difficulty
Type
Generic (SAE)
Recommended Tools
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