Electrical Fault Diagnosis St Albans

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

Alternator Repairs St Albans

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
St Albans 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
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
Relays St Albans
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
Car Won't Start
Most ignition problems are caused by battery failure or poor connection: Other causes include starter motor,fuse or relay failure
Starter Motor St Albans
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
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

Engine Won't Turn Over

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

Engine Turns Over but Won't Start

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

Fuses Relays and Connections

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

Electrical Testing and Installation St Albans

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