Mobile Motor vehicle repairs - Auto electrical & specialist services. Shrewsbury :
Car, Van or Truck breakdown ?
Mobile workshop vehicle diagnostic and vehicle repair callout services
around Telford, Shrewsbury
& Shropshire areas
Typical causes of vehicle breakdown can include:
Wrong Fuel :
eg Petrol car filled with diesel , Diesel
car filled up with petrol.
When a vehicle is refuelled with the wrong type of
fuel at the service station several problems may
1.The mixed fuel becomes a hazardous waste so needs
proper recovery and disposal
2. The engine will
possibly either not start or run erratically
Further engine damage may occur . The Fuel injection
system fitted to diesel engines can be susceptible
to damage caused by accidentally filling with petrol
Fuel injection system
Possible Cause: Fuel filter blocked, Injectors fault , black smoke,
wrong fuel, incorrect system calibration or timing. No
crank sensor signal, Fuel pump failure, fuel pump relay, sensor , actuator ,
or wiring defect, Electronic control unit failure.
Ignition system breakdown
No ignition spark ,Misfire, Difficult
Possible Cause: Broken wiring, electronic sensor
fault, blown fuse, wiring short, defective components,
HT leads, Coil pack, Ignition switch failed
Lights not working,
cause: Blown bulbs, fuses, electrical wiring circuit,
switches, control module fault,
If an electrical fuse keeps blowing on your vehicle - Do not replace
with a larger fuse as this may lead to further circuit
problems. Possible causes are failed component, wiring
Battery at end of life, low electrolyte level, wiring
fault causing current drain, charging system fault,
operator error eg lights left switched on.
Alternator drive belt failure / tensioner failure /
battery charge warning light on / dead battery
Clutch Broken or snapped clutch cable, clutch not clearing,
clutch hydraulic fluid leaking, clutch plates worn out
or damaged, oil leak onto clutch causing it to slip.
Broken belt, teeth missing from belt, idler bearing
failure. Failure of cambelt usually results in major
tyres: Puncture causing flat tyre Loss
of seal between tyre bead and wheel rim, Leaking valve.
stuck open, broken wiring, electric window motor
failure, switch fault, control module fault, wiring
Keys keys locked in vehicle.
Car keys lost, Central locking not working, Central
locking switches , wiring or control module fault.
Suspension fault ,Broken roadspring
, radius or control arm bushes , shock absorber bushes,
shock absorber fluid leaks.
steering oil leak, heavy steering, low tyre pressure,
steering rack damage or wear, electric power steering
failure, alternator failure, drive belt condition.
Steering track rod ends fitted.
broken pipe, mountings adrift. Broken exhaust manifold
studs, Lambda sensor faults, Emissions failure,
Catalytic converter or diesel particulate filter
blocked, dpf sensor faulty, wiring to dpf sensor faulty,
Engine Oil , Low
oil level , engine oil leak, Loss of oil pressure due to
wear or oil pump failure. Symptoms : Excessive exhaust
emissions, Engine oil warning light on, Low oil pressure
registered on guage. Effect : Can lead to seized engine.
Possible Problem: Overheating :
Possible causes : Low coolant level, leaking hoses, oil
in coolant, oil cooler failure, head gasket failure,
thermostat stuck, overheating, coolant temperature
sensor or circuit fault, fan motor failure, blocked
radiator, water pump failure, drive belt failure.
Blocked air conditioning condenser.
Possible Problem: Operating temperature too low ,
Excess fuel consumption, Difficult starting.
causes : Low coolant level, Thermostat missing or stuck
open, Coolant temperature sensor faulty, Wiring fault.
Possible Problem: Overheating :
Possible causes : Brake calipers or wheel cylinder
sticking master cylinder sticking , handbrake cable defective or incorrect
adjustment. Disc or drum surfaces scored.
Efficiency : Pulls to one side under braking, hydraulic
system fluid loss, pressure loss.
Possible Problem: ABS fault: damaged wiring, faulty
sensor, solenoids, modulator, switches. reluctor,
problems: Loss of coded key signal, Immobiliser
control unit fault,
Preventative Maintenance Inspection.
While some breakdowns are unforeseeable having
a preventative maintenance inspection done can often identify faults before they occur. For example wiring which may not be secured and chaffing
against sharp edges wearing away the insulation ready to cause a short circuit and a breakdown.
Your annual vehicle MoT test is a form of Preventative Maintenance Inspection to identify components corroded, or worn
or insecure that may cause a breakdown or threat to other road users.
However there are many items not covered by the
annual MoT inspection and a pass can mean that
a vehicle has only met a minimum standard of
roadworthiness. The credit crunch is affecting
many people and an attempt is often made to
reduce costs by extending service
Vehicle Breakdown Assistance
Roadside Breakdown Health & SafetyDo not place yourself or others at risk.
Where recovery is likely to obstruct
flow of traffic inform the police.
If possible park straight ahead with your vehicle wheels pointing to a safe impact area (usually the left on uk roads),this
is in case another vehicle crashes into the rear of your vehicle whilst it is broken down.
If you need to exit from your vehicle do so from the safe side and not into the traffic flow.
If your vehicle has been repaired or becomes mobile take care when rejoining moving traffic.
Be aware that intermittent faults which may have occurred then apparently disappeared may reoccur without notice.Have
your vehicle checked out as soon as possible.
Only specialist vehicles and trained technicians should attempt to recover vehicles from motorway networks.
This test identifies the ability of the battery to store energy for supplying the high current required to start your
vehicle from cold. The electrolyte level of the battery should be checked in accordance with the manufacturers instructions.
A battery on a 12 volt system should be recharged when the open circuit voltage drops to below 12.2volts . If a battery is
to be recharged off the vehicle it should be done in a well ventilated area away from sources of ignition.
On a functional charging system the vehicle battery is recharged by the alternator during operation. Warranty on vehicle
batteries is usually one, two, three, or four years, and the longer warranty being a slightly higher price. Vehicle batteries
are designated specifically to each manufacturers vehicle. It is essential that the vehicle battery is properly secured when
Symptoms of a defective battery are no ignition lights coming on , vehicle not starting ,charge warning light staying
on with the engine running. Battery faults can also be caused by defects in the vehicle charging system, or by wiring &
component faults causing current drain. Battery voltage which is too low or too high due to defective charging system can
have knock on effects on vehicle computer controlled systems including engine management and automatic transmission.
The purpose of the alternator is to provide electrical power for vehicle equipment and to supply energy to recharge the
battery as well. An alternator not charging can be caused by defective wiring , loose mountings, loose drivebelt , as well
as worn out components within the alternator. The alternator can be tested to a certain extent on the vehicle or removed for
Alternators on some later vehicles have their output controlled by the vehicle onboard computer.
Defects in starter motor operation can be caused by component failure within the unit or external component failure with
items such as battery , wiring, connections, ignition switch, immobiliser. etc
The timing belt synchronises operation of Crankshaft, Valve s and camshafts . Sometimes fuelling equipment also. The cam
timing belt is a rubber toothed belt running on sprockets and pulleys. Failure of the cam timing belt usually has disastrous
effects for the rest of the engine with pistons colliding with valves. The cam timing belt and idler pulleys should be renewed
as part of scheduled vehicle servicing. Engine oil leakage onto the cam timing belt can also encourage early failure.
Engine cooling system
Failure of the cooling system can be caused by leaks due to perishing of rubber hoses or failure / corrosion of components,
or gasket failure. Signs are engine overheating, coolant leaks, engine not reaching operating temperature, failure of thermostats,
Loss of engine coolant can
result in the engine overheating and a seized
engine or cylinder head / engine block damage.
Engine oil level should be maintained using the correct grade to manufacturers specification. Engine oil & filter
change is carried out as part of scheduled servicing.
Too little engine oil can result in component failure due to lack of lubrication. Too much can cause the running engine
to suck up the oil and use it as a fuel and accelerate to destruction. Waste engine oil requires safe handling and disposal.
Preventative maintenance to manufacturers specification will ensure your vehicle safety , life , and resale value.
This is just a brief overview and will be added to as I get time. There are many other items requiring regular maintenance
such as brakes, axles, gearboxes, lights ,etc.
Refer to your vehicle manufacturers handbook for further information.
A few things worth carrying in your vehicle in case of roadside breakdown:
* Mobile cellular phone *
* Contact details of a breakdown organisation & relatives *
* A blanket *
* Reflective Warning Triangle *
* High Viz jacket / vest *
* Flashlight *
* Tow rope *
* Battery booster cables *
* Wheelbrace *
* Jack *
* A Road Map so you can specify your location in case of breakdown in unfamiliar areas *
* Spare engine oil *
* Spare water *
* Spare bulb kit *
We are pleased to help with enquiries relating to vehicle electrical or mechanical maintenance and repair in Telford,Shrewsbury
, Shropshire areas.
Our phone number is 01952 247007
Website not a directory.Please visit other pages on this site
www.autoelectrics.net for more information.