Diagnostics

Electrical Fault Or Warning Lights

For battery, charging, wiring, sensor, module, communication and warning-light problems.

Cowbridge, Llantwit Major, Barry and Bridgend

Modern cars are networks of control modules

Electrical faults can appear as warning lights, non-starts, intermittent symptoms, charging issues, sensor faults, communication errors or module problems.

We inspect, measure, test power and ground, check communication and prove the fault before repair advice. Intermittent electrical problems need evidence, not guesses.

Diagnostics

What happens next

You do not need to know the workshop term. Tell us the symptoms and we will explain whether the car needs servicing, fault-finding or repair work.

What we look at

Wiring, sensor and control module fault paths.
Charging, starting and communication faults.
Intermittent electrical symptoms and repeat warning lights.
Clear route into engine, warning-light or starting checks where useful.

Plan your visit

Related services and bookings

Car will not start

Check engine light on

Fault nobody has fixed yet

Tell us the symptoms and we will explain the next step.

Include warning messages and previous work so we can discuss the right assessment or repair.

Contact Llandow Servicing

Visit our Llandow workshop for prestige car servicing across the Vale of Glamorgan and Bridgend.