The vehicle will not start
Battery, charging and starting-system checks.
Auto electrics
Start with the symptom when the electrical system acts up.
The battery, alternator, lights, wiring and starting system are checked systematically instead of replacing parts by guesswork.
Services and situations
Common electrical problems
Lights and signals
Faults in exterior and interior lights, fuses and wiring.
Battery drain
Finding unwanted consumers and checking alternator operation.
Intermittent contacts
Intermittent faults, oxidation, cables and electrical connections.
What happens next
How an electrical fault is narrowed down
Say exactly what does not work
Starting, charging, lighting and intermittent faults need different checks.
Note when it happens
A cold start, rain, driving or a long period parked can all be useful details.
Power and connections are checked
The battery, alternator, fuses, wiring and contacts are tested against the symptom.
The result determines the work
A part should not be replaced simply because it is the first possible cause.
Important before visiting
Do not keep trying if the wiring overheats
If you smell burning, see smoke or notice hot cables, switch the vehicle off when safe and do not continue driving without a professional check.
Driver guides
Read before visiting
ServiceService
A dashboard light came on: what to do first
How to separate a stop warning from a reason to arrange an inspection soon.Open topic
MaintenanceMaintenance
Minor and major service: what is checked and replaced
The difference between routine work and replacements that depend on engine, mileage and history.Open topic
DiagnosticsDiagnostics