Wiring
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Wiring Colours
These apply to MG cars, but there are some parallels with the Elise s1 at least - hopefully might prove useful!
Wire colours as referred to on the circuit diagrams in the service manuals:
- B= Black
- N=Brown
- R=Red
- O=Orange
- Y=Yellow
- G=Green
- U=Blue
- P=Purple
- LG=Light Green
- K=Pink
- S=Slate
- W=White
Naming convention:
UR = Blue wire with red stripe RU = Red wire with a blue stripe
Some occurences (check against service notes, some will be irrelevant and MG specific)
Component | Wire Colors |
Actual Colours |
Alternator or Generator | (B), N,(NG),NY | |
(Alternator or Generator Control Box) | (B, N,NG,NY) | |
Batteries | B,N | |
Starter Solenoid | N, (WR), (WY) | R, N, NR |
Starter | B | B |
Lighting Switch | N,(R),(RG),U | |
(Dip Switch pre '67) | U,UR,UW | |
RH Headlamp | B, UR,UW | B,UB,UY |
LH Headlamp | B,UR,UW | B,UB,UY |
Full/High Beam Warning Lamp | B,UW | B,UW |
R.H. Front Parking Lamp | B,R | B,RG |
L.H. Front Parking Lamp | B,R | B,RB |
(Panel Lamp Switch or Dimmer '68 on) | (R,RW) | |
Panel Lamps | B,RW | |
Number Plate Lamps | B,R | |
R.H. Stop/Tail Lamp | B,G,GP,R | |
L.H. Stop/Tail Lamp | B,G,GP,R | |
Stop Lamp Switch | G,GP | P,GP |
Fuse Block | N,G,P,(R),(RG),W | |
Courtesy or Map Lamp | (B),P,PW | |
RH Door Switch | B,PW | |
LH Door Switch | B,PW | |
Horn(s) | P,PY | |
Horn Switch | B,PB | |
Direction Flasher Unit | G,LGN | |
Column Flasher/Dip/Horn Switch | B,GR,GW,LGN,P,U,UR,UW | |
Flasher Indicator Lamp | G,GR or GW | |
RH Front Flasher Lamp | B,GW | B,GW |
LH Front Flasher Lamp | B,GR | B,GR |
RH Rear Flasher Lamp | B,GW | B,GW |
LH Rear Flasher Lamp | B,GR | B,GR |
Blower Motor Switch | G,GY | |
Blower Motor | B,GY | |
Fuel Gauge | GB,LGG | |
Fuel Level Sender | B,GB | |
(Windshield Wiper Motor Switch) | (B,BG), (G,NLG,RLG,ULG) | G,LGB,ULG,RLG,GK,GP |
Wiper Motor | (B,BG,G) or (NLG,RLG,ULG) | G,ULG,NLG,RLG,B |
Ignition Switch | N,PK,W,WG,WR | NW,Y,W,B |
Ignition Coil | W,WB | |
Distributor Contact Breaker | WB | |
Fuel Pump | B,W | |
Oil Pressure Gauge | B,WN | |
Ignition Warning Lamp | NB,NY | |
Speedometer | B, RW | |
Coolant Temperature Gauge | (B,GU) | |
(Coolant Temperature Sender) | (GU) | KG,KB |
Reversing Lamp Switch | G,GN | G,GN |
Reversing Lamps | GN | |
(Driving/Fog Lamp Switch) | (R,RY) | |
(Driving Lamp) | (B, UY) | |
(Fog Lamp) | (B,RY) | B,U |
Cigar Lighter/(Illumination) | GK,(RW) | G,B,(RB) |
(Radio) | (G,N) | P,G,RB,PG,BW,BS |
Instrument Panel Voltage Regulator | G,LGG | |
Boot/Trunk Lamp Switch | B,PW | |
Boot/Trunk Lamp | P,PW | |
(Line Fuse to 32,36,37,57,67b) (Line Fuse to 60) |
(GK,WG) (GK,RW) | |
(Line Fuse to 116 pre 67) (Line Fuse to 196) |
(W,WB) (S,SP) | |
(Overdrive Solenoid) | (YP) | |
(Overdrive Manual Switch) | (W,Y) | |
(Overdrive Gear Switch) | (YP,YR) | |
(Automatic transmission Illumination Lamp) | (B, RW) | |
(Windscreen/shield Washer Pump) | (G,LGB) | B,LGB |
(Auto Xmission Illumination Switch) | (RW) | |
Tachometer | W,W | |
(Courtesy or Map Lamp Switch) | (RG,RP) | |
(Courtesy or Map Lamp) | (P,RP) | |
(Heated Backlight Switch) (GT only) | (GB,WB) | |
(Heated Backlight) (GT only) | (GB,WB) | |
(Windscreen/shield Wash-Wipe Switch) | (LGB,NLG,RLG,ULG) | |
(Automatic Xmission Safety Switch) | (G,WR) | |
(Electrical Oil Pressure Sender) | (WN) | |
(Heated Backlight Lamp) (GT only) | (BG) | |
Hazard Warning Lamp | LGP | |
Hazard Flasher Switch | G,GR,GW,LGG,LGP | P,G,GR,GW,LGW,B,RB,PN |
Hazard Flasher Unit | LGN,N | PN,LGK,B |
(Brake Pressure Warning Switch/Lamp) | (BW,P) | |
(Brake Pressure Failure Switch) | (BW,BW) | |
(Ignition Key Warning Buzzer) | (PG,PK) | |
(Ignition Key Warning Door Switch ) | (P,PG) | |
(RH Front Side Marker) | (B,U) | |
(LH Front Side Marker) | (B,U) | |
RH Rear Side Marker | (B,U) | |
LH Rear Side marker | (B,U) | |
(Starter Solenoid Relay ) | (N,WN,WR) | |
(Running on Control Valve) | (SP,SY) | |
(Running on Control Valve Switch) | (SY) | |
(Driver Seat Belt Buckle Switch) | (LGW,NR),(B,YN) | B,BP |
(Passenger Seat Belt Warning Switch) | (B,LGW) | |
Passenger Seat Sensor | NP,YG | |
(Gearbox Seat Belt Warning Switch) | (LGW) | |
(Fasten Seat Belt Lamp) | (NR) | |
(Blocking Diode) | (NR,PG) | |
(Hand/Parking Brake Switch) | (GO) | |
(Hand/Parking Brake Warning Light) | (GO) | |
(Cigar Lighter Illumination) | (RW) | RB |
(Heater Control Illumination) | (B,RW) | |
(Heated Rear Window Relay) | (B,G,P,WB) | |
Drivers Seat Sensor Switch | (NP,YU) | |
Sequential Seat Belt Control Unit | (B,G,NP, PG,YG,YK, YO,YP,YU) |