Diagnostics
Warning light on? Our computer diagnostics find the cause, and we explain what to do about it.
Auto electrician in Tvrdošín
Today’s cars have dozens of control units and miles of cable. When something stops working, swapping parts blindly is not enough – the fault has to be found. That is our job: from a flat battery to treacherous broken wires that only show up now and then.
What we repair
Starting and charging
-
Battery testing, charging, replacement and registration (Start-Stop, BMS)
-
Starter motor repair and replacement
-
Alternator, regulator and freewheel pulley repair and replacement
-
Tracing hidden current drains (the car flattens its own battery)
Lighting and accessories
-
Headlights, bulbs and LED lights
-
Headlight adjustment
-
Wipers, washers, power windows, central locking, mirrors
-
Heating, fans, heated seats and windows
Wiring and electronics
-
Finding and repairing broken or corroded wires and connectors
-
Sensors – ABS, engine speed, temperature, pressure, parking sensors
-
Glow plugs and their control (diesel engines)
Typical electrical problems you bring to us
-
The car won’t start in the morning Or the starter only clicks.
-
The battery light comes on while driving The alternator is not charging.
-
The battery keeps going flat Even when the car stands for just a few days.
-
A light, wiper or window has stopped working And a new fuse did not help.
-
Several warning lights at once Often with one common cause.
-
The fault only appears sometimes For example in the rain or in frost.
Electrical faults often go hand in hand with diagnostics – we read the fault codes right at the start. More about computer diagnostics
We find the cause first, then replace parts
A needlessly replaced alternator or control unit is expensive. That is why we work systematically: we read the faults, measure voltages and resistances, check the wiring diagrams, and only once we know where the fault is do we suggest a repair.
It often turns out that no expensive part is needed – repairing a corroded connector or a broken wire is enough.
Have your battery checked before winter
Frosts below –15 °C, nothing unusual in Orava, expose every weak battery. Before winter we test yours with a battery tester and tell you whether it will last or it is time for a new one.
Frequently asked questions about auto electrics
How do I tell whether the battery or the alternator is at fault?
If the car runs after starting and only goes flat while driving, or the battery light is on, it is more likely the alternator. If it won’t start after standing, it is more likely the battery or a hidden drain. A measurement taking a few minutes gives certainty.
Why does my car’s battery go flat when it is parked?
Something in the car keeps drawing current after it is switched off – the radio, a module, the boot light. We can measure the drain and find the circuit causing it.
Can you replace the battery in a car with Start-Stop?
Yes. In such cars the new battery has to be registered with the control unit, otherwise it is charged incorrectly and fails sooner. We do this with the diagnostic tester.