If something electrical in your car has stopped working — a light, central locking, windows or a dashboard display — our electrical fault finding service at MH Auto Repair Centre helps trace the cause. For car electrical fault finding in Greenford, we check your vehicle’s wiring, fuses, connectors and electrical components to find exactly what’s gone wrong, rather than guessing. We’re based in Perivale, Greenford, and cover the surrounding West London area.
Message us on WhatsApp with your vehicle details and what you’re noticing, and we’ll get your electrical fault check booked in.
What Is Electrical Fault Finding?
Electrical fault finding, also called electrical fault diagnosis, is the process of tracing a fault in your vehicle’s electrical system — its wiring, fuses, relays, connectors and components — to identify exactly what’s causing a problem such as a light, switch or accessory that’s stopped working. Rather than replacing parts on a guess, we test the circuit involved to find the actual point of failure, whether that’s a blown fuse, a damaged wire, a loose connector or a faulty component. This is one of several checks under our wider vehicle diagnostics range.
This is different to a system-specific diagnostic scan. Electrical fault finding focuses on general wiring and component faults across the vehicle, such as lighting, central locking, windows and other electrical circuits, rather than reading fault codes from one particular system like the engine or the ABS.
Signs You May Have an Electrical Fault
It’s worth booking an electrical fault check if you notice any of the following:
- A light, switch or accessory that’s stopped working — an interior light, indicator, wing mirror, window or central locking
- A fuse that keeps blowing when it’s replaced
- An intermittent car wiring fault that comes and goes, especially over bumps or when steering
- A burning smell or visible damage to wiring
- Several electrical items failing at once, which can point to a wiring or earth fault
- A dashboard warning light appearing alongside an electrical symptom
What Our Electrical Fault Finding Covers
Our electrical fault finding service covers general wiring and component faults across your vehicle, including:
- Wiring and circuits — tracing breaks, damage or poor connections in the wiring loom
- Fuses and relays — checking for a blown fuse or a faulty relay affecting a circuit
- Connectors and earth points — a common source of intermittent electrical faults
- Lighting circuits — headlights, indicators, and interior and dashboard lighting
- Central locking, window and accessory circuits — motors, switches and their wiring
- Aftermarket wiring — faults introduced by non-standard wiring or accessories, where relevant
If your fault turns out to be specific to another system — such as the engine, ABS, airbags or the battery — we’ll let you know so it can be looked at under the right check instead.
How the Diagnostic Process Works
- Tell us what’s happening, including when the fault started and anything that seems to trigger it
- We inspect and test the circuit involved, using diagnostic equipment where the fault involves an electronic component
- We trace the fault to its source — a fuse, a wire, a connector or a component — rather than replacing parts on a guess
- We explain what we’ve found and provide a quote for any repair before starting anything
- With your agreement, we carry out the repair and test the circuit again before handing the car back
Electrical Fault Finding or a System-Specific Check?
Electrical fault finding covers general wiring, fuses and component faults across your vehicle. If your issue is clearly tied to one particular system, a dedicated check may be quicker: an ABS warning light points to an ABS-specific diagnostic check, an engine-related fault or warning light points to engine diagnostics, and a battery that won’t hold charge or a starting problem points to a battery diagnostic check. If you’re not sure which applies, message us with what you’re noticing and we’ll advise on the right check.
What Affects the Cost of Electrical Fault Finding
We don’t publish a fixed price for electrical fault finding, because it depends on the vehicle and how straightforward the fault is to trace. Factors that affect the cost include:
- The make and model of your vehicle and the complexity of its electrical system
- Whether the fault is a straightforward blown fuse or needs tracing through the wiring loom
- Whether a repair is needed afterwards, and what parts or labour that involves
We’ll always talk you through the likely cost after we’ve had a look at your vehicle, and you’ll get a quote before any repair work goes ahead.
Why Choose MH Auto Repair Centre for Electrical Fault Finding
We’re a family-run local electrical repair garage in Perivale, Greenford, and our technicians bring around six years of relevant experience to diagnostic and repair work. Every vehicle we look at also gets a free vehicle inspection, and any repair work carried out comes with our six-month warranty and genuine parts where appropriate. A replacement vehicle may be available where applicable — just ask the team when you get in touch.
Electrical Fault Finding FAQs
What is electrical fault finding?
Electrical fault finding is the process of tracing a fault in your car’s wiring, fuses, relays, connectors or electrical components to identify exactly what’s causing a problem, rather than replacing parts on a guess.
What causes electrical faults in a car?
Common causes include a blown fuse, a damaged or corroded wire, a loose or corroded connector, a faulty relay, or a fault at an earth point. Aftermarket wiring or accessories can also introduce electrical faults.
How do I know if I have an electrical fault?
Signs include a light, switch or accessory that’s stopped working, a fuse that keeps blowing, an intermittent fault that comes and goes, or several electrical items failing at once. A burning smell or visible wiring damage should be checked as soon as possible.
Is a blown fuse always the cause of the problem?
Not always. A blown fuse is often a symptom rather than the root cause — it can point to a deeper fault such as a short circuit or damaged wiring elsewhere in the circuit, which is why we trace the fault rather than just replacing the fuse.
Can electrical faults affect my MOT?
Yes. Faults affecting lighting, indicators or other electrical systems checked during an MOT can result in a fail. Getting an electrical fault diagnosed and resolved before your MOT is due can help you avoid an unnecessary fail.
How much does electrical fault finding cost?
Electrical fault finding cost depends on the vehicle and how straightforward the fault is to trace, so we don’t publish a fixed price. We’ll talk you through the likely cost once we’ve had a look at your car, and provide a quote before any repair work begins.
Book Your Electrical Fault Finding Check
Send your vehicle details and what you’ve noticed over on WhatsApp, and we’ll get your electrical fault check booked in with our team in Perivale, Greenford. Prefer another way to reach us? Visit our contact page.
