Electrical Fault Diagnosis Chelmsford

Sensors
Electronically controlled sensors for air flow, temperature and oxygen tested and replaced
Chelmsford Fault code reading and diagnostics
Electrical faults investigated and repaired in the Chelmsford area
Electrical Components Replaced Chelmsford
Alternators, starter motors, relays, wiper motors and most electrical components supplied and fitted Chelmsford

Alternators Chelmsford

Starter Motor Chelmsford
When the ignition system is initiated; an electrical signal switches a relay-solenoid to send power to the starter motor - The starter motor then engages the drive gear to turn and start your engine
Chelmsford Alternator Repairs
Alternators generate an alternating curent (AC) rather than the direct current (DC) used by automotive electrical systems; in order to convert AC to DC an array of diodes and rectifiers take the negative part of the voltge and invert it: A voltage regulator then maintains the 13 to 15 Volt power ouput needed to charge the battery nd run the autoelectrical systems
Battery Warning Light
Once your car has been started; if the battery warning light remains on then there could be a problem with the alternator-charging system or the battery itself
Car Won't Start
Most ignition problems are caused by battery failure or poor connection: Other causes include starter motor,fuse or relay failure
Relays Chelmsford
Relays are electric switches that typically use a small current or voltage in one circuit to close a switch that allows a much larger current to flow in a second circuit
Belt Drive
Most alternators are belt driven from the engine and require minimal maintenance other than changing the drive belt at the appropriate service interval
Power Train Control Module (PCM) & Electronic Control Unit
The engine management system will take control of regulating the output voltage from the alternator by switching the field current on and off with millisecond precision

Engine Won't Turn Over

• Engine seized
• Dead or Flat Battery
• Poor electrical Contact
• Faulty ignition switch

Engine Turns Over but Won't Start

• Immobiliser faulty
• No Fuel
• Blown fuel pump fuse
• Fuel pump relay faulty
• Fuel Pump broken
• ECM or PCM fuse blown or shorted

Fuses Relays and Connections

Blown Fuse
When parts of the electrical system fail then often the problem can be traced to a blown fuse or relay
Corroded Joints
Corroded joints can lead to connection problems and may be caused by water ingress or a mechanically loose joint sparking and oxidising

Electrical Testing and Installation Chelmsford

Chelmsford Engine Servicing & Repair
Engine repairs, cylinder head skimming, valves & pistons replaced Chelmsford
Chelmsford Fuel Pumps
Often replaced at a milestone service if the fuel pump is operated by the Timing belt
Chelmsford Electrical Components
Electrical faults repaired using OEM components - Critical sensors checked e.g. Lambda sensors, air flow meters etc
Chelmsford Autoelectrics - OBD & OBD II
Chelmsford electrical faults diagnosed - OBD fault finding - engine fault codes checked & service lights reset - ECU problems diagnosed, key re-coding and CANBUS systems checked
Chelmsford Starter Motors
Replacement Chelmsford Starter motors installed
Chelmsford Cooling System
Replacement Chelmsford radiators fitted, cooling system pipework inspected for leaks and cooling fluid replaced to keep your Chelmsford engine at its optimal operating temperature
Chelmsford Performance Spares Fitted
OEM replacement parts fitted or upgraded with alternative performance parts such as suspension kits and air filters
Chelmsford Alternators
Replacement Chelmsford alternators fitted