Stellantis Fault Code
Free · no signupB2A00
Exterior Lights Inoperative / BCM Code
System
Lighting / BCM
Symptom
Exterior Lights Inoperative / BCM Code
Diagnosis & fix steps
LOGIC: High-Side Driver Output Fault (Short to Ground / Open).
ACTION: Inspect wiring harness leading to the affected lighting branch (headlamps/tail lights). Check for aftermarket LED bulb ballasts or trailer wiring socket shorts to ground.
Red Seal field insights
Solid-State Drivers: Modern RAM BCMs use smart MOSFET high-side drivers instead of mechanical fuses; detecting repetitive short-circuit current shuts down the output permanently until reset.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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