Ignition coil

MG: MGB rubber bumper from September 1974: Roadster from GHN5-360301, GT from GHD5-361001

Mini: All cars with points distributor 1982 onwards i.e. not 1275 cc models with electronic distributor (1992 onwards)

Sprite / Midget: Midget 1500 (1974-79)

Triumph: Spitfire: MK4 and 1500 (1974-80) • TR6: Carburettor from CF1, P.I. from CR1 • Stag (1970-77)

TVR: Vehicles with Ford 1600 cc. Kent Crossflow engine: Vixen S1, S2, S3, S4 (1967-73) • 1600M (1972-77)

Morgan: 4/4 with Ford 1600 cc. Kent Crossflow engine (1968-82)

Ford: Vehicles with 1600 cc. Kent Crossflow engine: Cortina Mk2, Mk3, Mk4 and Mk5 (1967-82) • Capri Mk2 (1974-78) • Pinto (1971-73) • Escort Mk1 and Mk2 (1968-81)

Jaguar: E-Type 4.2 Series 2 (1969-70): OTS from 1R1393 and 1R11052, FHC from 1R20486 and 1R27051, 2+2 from 1R35643 and 1R42850 • XJ6 4.2 Series I from engine no. 7L35133, XJ6 2.8 Series I from engine no. 7G17029, all 4.2 Series II, 4.2 Series III to engine no. 8L87700 (all countries except USA, Canada, Japan and Australia)

Range Rover: Classic: V8 carburettor (1970 to October 1985)

Aston Martin: DB5 (1963-65) • DB6 (1965-70) • DBS six cylinder models (1967-72) • DBS V8 without Opus ignition system (1970-71)

Rolls Royce and Bentley: Rolls Royce Silver Spirit plus Bentley Mulsanne except Turbo models from 1982 to 1986 (from VIN...6751 to 16970) • Bentley Mulsanne Turbo and Turbo R from 1982 to 1986 (from VIN...4233 to 16570)

with push-in HT lead terminal and approx. 1.4 Ohm primary resistance. Ballasted type

Ignition coils have a “+” (POS) and a “-” (NEG) next to each of it’s two low voltage terminals. That’s because coils need to have the same polarity as your system: wiring backwards will weaken the spark. The wire that goes between the distributor points and the low voltage terminal on your coil, the low tension lead, should be connected to the terminal that is labelled for the same polarity as your battery ground. For instance in an early positive earth British Classic Car, the low tension lead should attach at the terminal marked “+” (POS). If that same vehicle were converted to negative earth the coil should be turned 180 degrees in the holder and the wire connected to the “-” (NEG) terminal.