MGB Wiring Diagram Key - Component Numbers & Cable Colour Code (Page 312)

This is page 312 (section Nb, page Nb.2) from an MGB workshop manual, titled 'Key to the Wiring Diagrams.' It provides a master numbered legend used to identify components on all wiring diagrams in the manual — readers apply this single key to whichever wiring diagram matches their car, ignoring numbers not present on their diagram. The list covers component numbers 1 through 203, including charging (alternator/dynamo, control box), starting (starter solenoid, motor, relay), lighting (headlamps, parking, stop/tail, flashers, side-markers), instruments (fuel gauge, speedometer, tachometer, coolant temperature and oil pressure gauges/transmitters, bi-metal voltage stabilizer), overdrive components (relay, solenoid, switches), hazard warning circuit, brake pressure warning, heated back-light items (GT only), and seat belt warning components. Item 26 has four alternative descriptions depending on switch configuration. The page also includes the cable colour code table (N Brown, U Blue, R Red, P Purple, G Green, LG Light Green, O Orange, W White, Y Yellow, B Black), with a note that when a cable has two colour letters the first is the main colour and the second the tracer. Footer reads 'MGB. Issue 1. 82448.'