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    New ignition switch letter codes/wiring help

    I bought a new ignition switch for a 1987 Mercury 90. It's a Mercury Quicksilver 54211T designed to place my A-54211A2. The wiring letters on the back of the new switch don't correspond to some of the old letters and there are only 5 contacts instead of the 6 on the old one. Old letters: CBMAMS...
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