Diagnostic Test: 12V alternator Output test

Diagnostic Test - Alternator Output Test (12V) Concept The alternator is the heart of the charging system. It is an alternating-current generator mounted on the engine, which is driven by a belt from the crankshaft. The alternator develops alternating current, which is changed to direct current. Alternating current changes from positive (+) to negative (-) at a regular cycle. Direct current does not change from positive (+) to negative (-). Only direct current can be used to …

…amp;lt;Tab/>Check fan belt tension for looseness and slippage on the alternator pulley (may need tensioning or replacement) ·<Tab/>Check/test voltage regulator. (May need replacement) If voltage is greater than 15.1V ·<Tab/>Check/test voltage regulator (may need replacement) ·<Tab/>Check/test battery (may be burnt out from overcharging)