Modules
Body Control Modules (BCM) in Telford
The Body Control Module (BCM) — or SAM on Mercedes, UEC/REC on Vauxhall — is the hub for a huge swathe of the car's electrical functions: locking, lighting, wipers, horn, interior and comfort systems. When it fails or is mis-coded, dozens of things go wrong at once. We diagnose BCM faults at module level, and on common failures like the Transit Custom BCM we can clone your data into a replacement so the car keeps its configuration.
Common Symptoms
If you are seeing any of the following, it points to a body control modules (bcm) issue we can diagnose:
- Central locking, lights, wipers or horn behaving erratically together
- Horn going off on its own, or lights staying on (common Transit Custom BCM failure)
- Multiple comfort-system faults that appeared at the same time
- BCM replaced and now functions are missing or coding errors appear
- Water ingress into the BCM area
- Key not recognised due to BCM / immobiliser link failure
Common Causes
Faults like this rarely have a single cause. The usual culprits we find are:
- Internal BCM component failure (notably Ford Transit Custom)
- Water ingress corroding the module or its connector
- Module replaced without correct configuration / cloning of the original data
- Variant coding lost after a battery or module swap
How We Diagnose Body Control Modules (BCM)
01We confirm the BCM is the cause — not a wiring or switch fault feeding it.
02On clonable modules (e.g. Transit Custom BCM) we read your original data and clone it into a replacement, plug-and-play.
03Replacement BCMs are variant-coded to the car so all functions return.
04Security and immobiliser links to the BCM are re-established after any replacement.
Other Faults We Diagnose
Related Services
Next Step
Book in your vehicle.
Tell us about the symptoms you're seeing — we'll diagnose it properly with dealer-level tooling and come back with the next steps.