Battery Service

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BATTERY CLAMP - POST RESISTANCE
Resistance between the battery terminal post and the clamp can account for the battery not being completely recharged and is often a problem. Although it may visually look all right, oxidation of the metal or slight corrosion can cause excessive resistance at the connection, thus creating a voltage drop and lowering current flow to the starter. Battery post and clamps should be cleaned at each battery inspection. To check for excessive resistance, perform a voltage drop between the battery terminal post and the clamp (shown below) while cranking the engine. The voltage drop reading should be 0.0 volts. Any voltmeter reading higher than "zero" volts requires cleaning the connection and rechecking.