Diagnostics

Electrical Fault Or Warning Lights

For battery, charging, wiring, sensor, module, communication and warning-light problems.
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Llandow workshop, South Wales customers

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.
If the problem points elsewhere

Other useful routes

Car will not start

This is often the better route when the symptoms, service history or inspection point in a different direction.

Read more

Check engine light on

This is often the better route when the symptoms, service history or inspection point in a different direction.

Read more

Fault nobody has fixed yet

This is often the better route when the symptoms, service history or inspection point in a different direction.

Read more
Not Sure What Is Wrong?

Tell us the symptoms and we will point you in the right direction.

If you are unsure whether the car needs servicing, fault-finding or repair work, start with the free first check.

Contact LT Servicing