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The low-tension circuit

The low-tension circuit Coil LT + lead Battery Ignition switch LT lead Distributor

The low-tension circuit feeds low-voltage current from the battery to the ignition coil, where it is boosted to high voltage for the spark plugs.

Explained in

    Checking the low-tension circuit

    The low-tension (LT), or primary-ignition, circuit consists of the battery, ignition switch, contact breaker, and the primary winding of the coil. Read more