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MGA ELECTRICAL - FUNCTION & TESTING
Also see articles under Electrical - Restoration & Modification and Ignition
.

ET-091 - COLOR CODES and TROUBLE-SHOOTING
ET-092 - WIRE COLORS Used In The MGA
ET-093 - WIRE SIZES Used In The MGA
Original Lucas slow blow fuses ET-094 - HARNESS STYLES, Original And Replacement
ET-095 - HARNESS WRAP For Repair
ET-096 - HARNESS WRAP Cloth Cover Color Codes and Thread Count
ET-098 - Why POSITIVE EARTH?
ET-099 - How to IDENTIFY Positive or Negative Earth

ET-100A - Wiring HARNESS INSTALLATION
ET-100B - DASH CABLES for MGA 1500
ET-100C - DASH CABLES for MGA 1600
ET-100H - SEQUENCE OF WIRING - Don't Burn the Harness
ET-100I - HARNESS Wire By Wire, Grounding, Tools, and Resistances
ET-100J - HARNESS Wire By Wire, Primary Lighting Circuits
ET-100K - HARNESS Wire By Wire, 1500 Type turn signals and brake lights
ET-100L - HARNESS Wire By Wire, 1600 Type turn signals and brake lights
ET-100M - HARNESS Wire By Wire, Everything that is not lighting circuits
ET-100R - HARNESS ROUTING and Fasteners In The MGA
- ET-100RB - HARNESS ROUTING Brackets
- (140-KB pdf file)
- ET-100RF - HARNESS ROUTING and Fasteners
- (307-KB pdf file)
- RT-118 - ROUTING in ENGINE BAY, Fuel, Hydraulic, Electric

ET-101 - SIMPLIFIED WIRING DIAGRAMS, Base Page
ET-101A - SIMP ABBREVIATIONS for Electrical Diagrams
ET-101B - SIMP Charging circuit
ET-101C - SIMP Starter circuit
ET-101D - SIMP Spark and Fuel circuits
ET-101E - SIMP Switch On and Fused circuits
ET-101F - SIMP Switch On and Fused 1500 circuits
ET-101G - SIMP Switch On and Fused 1600 circuits
ET-101H - SIMP Non-Fused circuits (Lighting)
ET-101I - SIMP Fused Always Hot circuit (Horn)
ET-101J - SNAP CONNECTOR Count for MGA cars
ET-101K - WIRING DIAGRAMS In COLOR for MGA Cars

ET-102 - SLOW BLOW FUSES and why you should not use "standard" fuses
ET-102A - FUSE BOX - which fuse goes where
ET-103 - LIGHTING GREMLINS, bad contacts and diagnostics
ET-103A - LUCAR CONNECTORS, and why I hate them
ET-103B - GROUNDING POINT Preparation & Cleaning Connectors
ET-103C - BULLET CONNECTORS - Living With Them
ET-103D - SLEEVE TERMINALS for Wires - Where and How To Install

ET-104 - Turn signal FLASHER UNIT test and function
ET-104A - Turn signal INDICATOR LAMP Assembly
ET-105 - Turn signal RELAY (1500 only) test and function
ET-106 - Turn signal SWITCH odd terminal markings
ET-107 - Tail Light & Brake Light BULBS
ET-107A - DUAL FILAMENT BULB Polarity Connections
ET-107B - 1500 Type Front PARKING LAMP Electrical Contacts

ET-108 - HEATER MOTOR maintenance
ET-109A - HORN Mounting
ET-109B - HORN Brackets
ET-109C - HORN Parts, Optional Extra
ET-109R - os - HORN Adjustment and repair (0.9-MB pdf)

ET-110 - Special notes on WIPER MOTOR WIRING, parking and blown fuses
ET-111 - Adjusting WIPER MOTOR parking position
ET-111A - Converting WIPERS from LHD to RHD (or vice versa)
ET-112 - WIPER SPEED and WIPER BLADES
ET-112A - WIPER ARMS And BLADES For MGA
ET-112B - WIPER BLADES For MGA, Original Rainbow Type
ET-112C - WIPER ARM Tension Adjustment
ET-112D - WIPER DRIVE SPLINES Not As Original
ET-113 - WIPER MOTOR R&R the "easy" way
ET-113A - WIPER WHEELBOX Maintenance
ET-113B - WIPER SPINDLE Rubber Grommet
ET-113C - WIPER SPINDLE Seal
ET-113D - Wiper Motor SUPPORT BRACKET For MGA
ET-113E - Wiper Motor MOUNTING BRACKET For MGA

ET-114 - DIPPER SWITCH assembly and service
ET-114A - DIPPER SWITCH MOUNTING
ET-114B - DIPPER SWITCH MOUNTING HARDWARE
ET-114C - DIPPER SWITCH MOUNTING BRACKET, MGA 1600 LHD
ET-114D - DIPPER SWITCH MOUNTING BRACKET, MGA 1500 LHD and 1500 RHD and Twin Cam LHD
  AT-113 - Flash To Pass Switch (accessories)
  AT-113A - Flash To Pass and Headlight Dipper (accessories)
ET-115 - Instrument LAMP HOLDER Puzzle
ET-116 - LIGHTING SWITCH Terminals
ET-116A - LIGHTING SWITCH Repair
ET-117 - LIGHTING SWITCHES, Old and New
ET-117A - LIGHTING SWITCHES #2, A New One Falls Apart
ET-118 - TAIL LIGHT REPAIR
ET-118A - TAIL LIGHT LENSES
ET-119 - BRAKE LIGHT SWITCH
ET-119A - BRAKE LIGHT SWITCHES, Good Ones or Bad Ones
ET-119B - BRAKE LIGHT SWITCHES, Good Or Bad #2
ET-119G - BRAKE LIGHT SWITCHES, Good Ones
ET-119G2 - BRAKE LIGHT SWITCHES, Good, DURALAST RD401
ET-119G3 - BRAKE LIGHT SWITCHES, Good, INTERMOTOR 51600
ET-119X - BRAKE LIGHT SWITCH, Construction and Failure
ET-119X2 - BRAKE LIGHT SWITCH Failure, Borg Warner

ET-120 - CHARGING SYSTEM Test and Repair Notes
ET-120A - os - Function of GENERATOR and VOLTAGE REGULATOR
ET-121 - CONTROL BOX Bench Testing
  MG-324 - Control Box, Resistance, 27Jul60 (csm)
  MG-342 - Control Box, Resistance, 04Jan61 (csm)
ET-122 - GENERATOR Supplied (originally) WITHOUT Fan or Pulley
  MG-205 - Dynamo pulley size changed, pushrod cars (csm)
  MG-237A - Dynamo pulley size changed, Twin Cam (csm)
ET-123 - Generator PULLEYS and FANS

ET-124 - IGNITION SWITCH Terminals and Wiring, MGA
ET-125 - IGNITION SWITCH Keying & Internal Parts, MGA
ET-126 - IGNITION SWITCH Repairing Electrical Parts, MGA
ET-127 - IGNITION SWITCH Key Types and Key Cutting, MGA
ET-128 - 6-VOLT BATTERY (batteries), Original Style
ET-129 - Keep Your BATTERY (Batteries) CLEAN
ET-130 - TRICKLE CURRENT Draining the Battery
ET-131 - SINGLE POLE SWITCH Anatomy
ET-135 - HEADLAMP Terminals
ET-136 - HEADLAMP Types and Styles for MG
ET-137 - HEADLAMP Cleaning
ET-140 - LUCAS Electrical Part Numbers for MGA
ET-141 - SPECIAL NUMBER PLATE LAMP For Switzerland
ET-142 - SPECIAL SIDE MARKER LAMP For Denmark

Fuel gauge, back and front Fuel gauge, inside view
FG-101 - construction and OPERATION of the MGA FUEL GAUGE
  FG-101-MGB - os - construction and OPERATION of the MGB FUEL GAUGE
FG-102 - CALIBRATION of the MGA FUEL GAUGE
  FG-102-MGB - os - CALIBRATION of the MGB FUEL GAUGE
FG-103 - special notes on FUEL GAUGE WIRING
FG-104 - FUEL GAUGE TROUBLESHOOTING
FG-105 - SOLDERING SMALL WIRES

FG-110 - FUEL SENDER General Notes, MGA
  FG-110-MGB - os - FUEL SENDER Notes and calibration, MGB
FG-111 - FUEL SENDER Sealing
FG-115 - FUEL SENDER UNIT, Incorrect Range

FP-101 - Fuel Pump POLARITY and electrical grounding
FP-102 - Fuel Pump ROAD FIX
FP-103 - Fuel Pump MOUNTING BRACKET Drawing
FP-104 - Fuel Pump MOUNTING SCREWS

RO-102 - ENGINE RUN-ON, Electrical - (see Engine)

SS-100 - STARTER DUTY CYCLE
SS-101 - S-L-O-W CRANKING STARTER, Cables and Ignition Timing
SS-101A - S-L-O-W CRANKING STARTER, Brushes
  MG-347 - Starter Brush Springs (csm)
SS-102 - DEAD STARTER - Inertia Type
SS-102A - DEAD STARTER - Pre-engaged Type
SS-103 - BATTERY CABLES For MGA
SS-103A - LARGER BATTERY CABLES For MGA
SS-103B - CUSTOM P-CLIPS For Larger Battery Cables
SS-104 - STARTER SWITCH Wiring For MGA
SS-105 - STARTER SWITCHES, Bad and Good
SS-106 - STARTER SWITCHES, Original Quality
SS-110 - STARTER MOTOR Repair #1
SS-112 - STARTER MOTOR Repair #2

Also see articles under Electrical - Restoration & Modification and Ignition

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