Ignition - 6v coil and ignition relay, North American Cars
Hover over a wire to confirm the colour

Note 1: North American cars can suffer from a problem whereby the engine may continue to run normally (not Dieselling) when the ignition is switched off see here.

Note 2: There is a separate green circuit for the electric cooling fans fed via an in-line fuse from the white/brown.

Note 3: Late models have round black relays with ISO terminal numbering as follows:

Wire colourOriginal numberingISO numbering
White from ignition switchW185
Black groundW286
Brown 12v supplyC230
White/brown to ignition powered circuitsC187