Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 181 (EXTERIOR LIGHTING (2 OF 2))DIAGNOSIS AND TESTINGSTOPLAMPSBCMB (AUXILIARY LIGHTING CONTROL MODULE [ALCM])DTC CHART: BCMB (AUXILIARY LIGHTING CONTROL MODULE [ALCM])
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
DTC Chart: BCMB (Auxiliary Lighting Control Module [ALCM])
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION DTC Chart: BCMB (Auxiliary Lighting Control Module [ALCM])
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
BCMB (Auxiliary Lighting Control Module [ALCM]) DTC Chart
NOTE:
The Auxiliary Lighting Control Module (ALCM) is referred to as the BCMB by the diagnostic scan tool.
| DTC | Description | Action |
|---|---|---|
| B132B:11 | Left Stop/Turn Lamp: Circuit Short To Ground | GO to Pinpoint Test E |
| B132B:15 | Left Stop/Turn Lamp: Circuit Short To Battery or Open | If the lamp is inoperative, GO to Pinpoint Test E If the lamp is always on, GO to Pinpoint Test G |
| B132C:11 | Right Stop/Turn Lamp: Circuit Short To Ground | GO to Pinpoint Test E |
| B132C:15 | Right Stop/Turn Lamp: Circuit Short To Battery or Open | If the lamp is inoperative, GO to Pinpoint Test E If the lamp is always on, GO to Pinpoint Test G |
| U1000:00 | Solid State Driver Protection Active -Driver Disabled: No Sub Type Information | The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The BCMB cannot enable the output until the cause of the short is corrected. ADDRESS all other Diagnostic Trouble Codes (DTCs) first. After the cause of the concern is corrected, CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. |
| U3000:49 | Control Module: Internal Electronic Failure | The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCMB can withstand. The cause of the excessive current draw MUST be corrected before a new BCMB is installed. ADDRESS all other Diagnostic Trouble Codes (DTCs) first. After the cause of the concern is corrected, INSTALL a new BCMB. |
| For other BCMB Diagnostic Trouble Codes (DTCs) | - | REFER to: Headlamps . |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.