Before revision: Color coding Color Continuous ampere (=rated current) Instantaneous fusing ampere Continuous fusing ampere Blue 1.5 3.5 3 Yellow 2.25 5 4.5 Red on yellow 2.5 6 5 Green 3 7 6 Nut brown 4 10 8 Red on green 5 12 10 Green on black 5 12 10 Red on brown 6 14 12 Light brown 7.5 18 15 Pink 12.5 30 25 White 17.5 40 35 Purple on yellow 25 60 50 Yellow on red 30 75 60 Glass tube type Glass tube type fuse North-American built automobiles up to at least 1976 had electrical systems protected by cylindrical glass cartridge fuses rated 32 volts DC and current ratings from 4 amperes to 30 amperes.
After revision: Color coding Color Continuous ampere (=rated current) Instantaneous fusing ampere Continuous fusing ampere Blue 1.5 3.5 3 Yellow 2.25 5 4.5 Red on yellow 2.5 6 5 Green 3 7 6 Nut brown 4 10 8 Red on green 5 12 10 Green on black 5 12 10 Red on brown 6 14 12 Light brown 7.5 18 15 Pink 12.5 30 25 White 17.5 40 35 Purple on yellow 25 60 50 Yellow on red 30 75 60 Glass tube type Glass tube type fuse North-American built automobiles up to at least 1981 had electrical systems protected by cylindrical glass cartridge fuses rated 32 volts DC and current ratings from 4 amperes to 30 amperes.