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After W.W.II Lucas Industries was the
main stream for all electrical components in British Automobiles.
As everyone gives Lucas a real hard time, they did come up with some
great ideas. One idea was the standardization of electrical
wire codes. This basically means a BROWN
wire in a MG has the same results as a BROWN
wire in a Triumph, Healey or Jaguar ... or what ever British car you
drive. This in turn makes it quite easy to work on the wiring
of your LBC.
Now, most Lucas circuits are based on three types of wire systems. (1) a supply wire, (2) a switch wire, & (3) a return wire (or ground). The return wire may just be a chassis ground trough a metal object and you may not have a wire at all. All return wires are BLACK . The supply wire is always solid in color and the switch wire has a tracer (or striped line). The base color tells you what feed source you're using, i.e. switched, always hot, fused, or not fused. Please keep this chart handy when working on your LBC. It will help better understand the simplicity of British wiring. |
B ..... BLACK .....................................................
GROUND!!!
N ..... BROWN . Battery Feed Circuit, Hot at ALL Times Y ..... YELLOW ........................................ Generator Circuit W .... WHITE .............. HOT with Ignition ON! Not Fused G ..... GREEN ................... HOT with Ignition ON! Fused, Auxiliary
Circuits
GR ... GREENw/ RED ................ Left Side Signal Lights GW .. GREENw/ WHITE ......... Right Side Signal Lights GP ... GREEN w/ PURPLE .......................... Brake Lights GN .. GREEN w/ BROWN ......................... Reverse Light P ..... PURPLE ............. Always HOT, Fused - Courtesy, Brake Lights, etc.
R ..... RED ......... Running Lights - Tail, Side, Park, etc. RY ... RED w/ YELLOW ................... Fog / Driving Lights U ..... BLUE .............................................. Headlight Circuit UR ... BLUE w/ RED ....................................... Low Beams UW... BLUE w/ WHITE .................................. High Beams WR .. WHITE w/ RED ............................. Starter Solenoid ?B ....? w/ BLACK . Switched Circuit on a Ground Leg WK .. WHITE w/ PINK .................... (Fiber Weave Cover) Resistive Ignition
Wire
OTHER COLORS & CODES: No Application is Specific. K PINK S SLATE L LIGHT D DARK |
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