Car Diagnostics in Pear Tree

Pear Tree is a small rural hamlet in South Devon, reached by narrow country lanes. Families here often run more than one car, and the second car or the weekend car can sit unused for days, which is hard on batteries and can leave alarms and immobilisers acting up.

We are Automaster, at Longcombe Cross, Longcombe, near Totnes. Drivers from the surrounding countryside and from Totnes, Dartington, Paignton and Churston bring petrol and diesel cars to us for diagnostics and auto electrical repairs.

Car battery replacement: when is it time?

Slow starting, a clicking sound, interior lights that dim as you turn the key or a battery that goes flat after standing are all signs. A battery that has had a long working life, or one used mostly for short trips, is more likely to fail.

Before replacing it, the charging system should be checked so a new battery is not run down by a weak alternator. Some cars need the replacement registered with the engine computer, and stop-start cars need a particular type. Give us the details when you ask for a quote.

Why does my alarm or immobiliser misbehave?

A low battery can upset the alarm and immobiliser, causing false alarms, a key that is not recognised or a car that will crank but not start. Other causes include faulty door or bonnet switches, wiring damage and key faults.

We diagnose alarm and immobiliser faults by checking the car's inputs and outputs. What can be done depends on the make and model, so ask for a quote and describe what happens.

What happens in a full vehicle diagnostic check?

We read stored fault codes and live data across the car's control units. A fault code points to a circuit or system, and it is not a parts list. The rest is testing: wiring, connectors, supply, earth and the component itself.

This is why we avoid naming a part before we have looked. The same warning light can come from several different causes.

• Reading codes
• Live data
• Circuit testing
• Repair
• Recheck

Warning lights in plain terms

Amber engine light: a fault is logged in engine or emissions control. Battery light: the charging system is not working. ABS light: anti-lock braking is off, though normal braking usually remains. Airbag light: the safety system has a fault.

Red oil, coolant temperature or brake warnings mean stop safely and do not keep driving. Reversing cameras, parking sensors and wiring faults are also part of our work.

Do you cover Pear Tree, and how do I find you?

We do. The garage is at Longcombe Cross, Longcombe, near Totnes, TQ9 6PL, and welcomes drivers from Pear Tree, Totnes, Dartington, Paignton and Churston.

Ask for a quote and tell us the make, model, year and symptoms. If the car is not safe to drive, do not take the risk. Mention if it is a second car that is only used now and then, as that changes where we look first for a battery drain.