What makes this easier for you from the start
Fault-find before parts-buying
We test first, and guessing never enters the picture. That can save you from paying for parts that do not fix the fault.
Repairs backed by rechecks
Once the repair is done, we check the system again. You get better confidence that the original issue has actually been cleared.
Garage-based fault-finding
We carry out electrical fault-finding from our garage, with the equipment and access needed for accurate testing and repairs.
Find the real cause before parts get changed
Electrical faults can be maddening because the symptom you notice is not always where the problem starts. We use car electrical fault testing at Throttle Range Ltd to trace warning lights, starting troubles, battery drain, and charging issues back to the real cause instead of guessing. That matters when your car starts one morning and refuses the next, or when a battery keeps going flat for no obvious reason. We begin with the symptoms you have seen, then use diagnostic scans and targeted testing to build a clearer picture of what the vehicle is trying to tell us. Once we know what has failed, we can carry out the repair or replace the affected part to restore normal operation. You get a fault-find first service that helps avoid wasted money on parts your car never needed in the first place.
How we test and repair electrical faults
Warning lights, intermittent non-starts, charging problems, and unexplained battery drain are all signs that proper testing comes first. We start by checking the history of the fault at Throttle Range Ltd, then scan for stored codes before moving on to focused electrical tests that confirm the root cause. Some issues tie into driveability and emissions systems too, because a sensor or wiring fault can sit behind DPF or EGR warnings and poor running. Depending on the fault and equipment needed, we complete the work at our Slough garage, where we have the space and tools for accurate testing and repair.
Frequently asked questions
What symptoms suggest my car has an electrical fault?
Common signs include dashboard warning lights, intermittent starting, a complete non-start, battery drain, charging issues, or electrical items working on and off. If the problem seems random, proper testing is usually the quickest way to narrow it down.
What happens during Auto Electrical Diagnosis?
We begin with the symptoms and any recent history, then scan the vehicle for fault codes and carry out targeted electrical tests. Once we confirm the root cause, we can advise on the repair needed and recheck the system after the work is complete.
Can electrical faults be linked to DPF or EGR problems?
Yes, they can. Sensor, wiring, or control issues may trigger warning lights, poor running, or faults linked to DPF and EGR systems, so electrical diagnosis can be an important part of solving the wider problem.