B2507

Code

Other B — Body

RF LAMP HIGH BEAM CIRCUIT Failure

Brand: Other

Type: B — Body

Views: UK: 21 EN: 35 RU: 22

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Burned out or faulty high-beam bulb (halogen, HID ballast failure, or LED driver failure)
Open or shorted wiring between the lamp and the body/control module
Corroded or loose connector or socket at the right-front lamp
Faulty ground at the right-front lamp circuit
Blown fuse or failed high-beam relay
Faulty body control module (BCM) or headlamp control module output

Retrieve freeze-frame/data and current DTCs with scan tool; confirm B2507 is active
Visually inspect RF headlamp assembly, lens, and connector for corrosion, water, or damage
Check for blown fuses and correct relay operation for high beams
Verify bulb type and seating; inspect bulb filament or LED for visible damage
Inspect wiring harness for chafing, pinched sections, or rodent damage near RF lamp and along harness routing
Backprobe the RF high-beam connector while commanding high beams on/off and observe voltage and ground

With high beams OFF: lamp positive pin ≈ 0 V (or low PWM duty)
With high beams ON: lamp positive pin ≈ battery voltage (approx. 11–14.5 V) for halogen/HID; LED modules may see PWM at battery-level amplitude
Typical halogen high-beam current draw: roughly 1–6 A (varies by lamp type); LED current lower but depends on module
Bulb filament resistance when cold: typically low (a few ohms) and higher when hot; measure continuity (non-infinite)
Open-circuit: infinite resistance between positive and lamp ground; short-to-ground: near 0 Ω between positive and vehicle ground
If module-driven, control output may be PWM — typical frequency range 200–2000 Hz depending on manufacturer

Confirm the symptom and verify the DTC B2507 with a scan tool; note any related codes
Visually inspect the RF lamp, connector, wiring, and mounting for damage or corrosion
Check fuses and relays for the high-beam circuit; replace if faulty and retest
Swap the RF high-beam bulb with the LF high-beam bulb (or known-good bulb) to determine if the bulb is faulty
Backprobe the lamp connector while commanding high beams ON: verify battery voltage at the feed pin and good ground at the ground pin
If no voltage at connector, trace wiring back to the fuse/relay and BCM; perform continuity and resistance checks to locate opens or shorts
If voltage is present but lamp does not light and bulb is known-good, check resistance of bulb/socket and measure current draw; inspect for intermittent connection
Inspect and clean connector pins and grounds; repair or replace damaged wiring or connectors (solder, crimp, or replace harness section as appropriate)
If wiring and lamp are good, test output driver at BCM or headlamp module per manufacturer's diagnostic data; if module driver is faulty, follow module replacement and programming procedures
After repairs, clear codes, cycle lights, and road-test to confirm repair; re-scan to ensure the DTC does not return