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Alternator Output Curves for Ford 3G (95A & 130A), Leece-Neville 165A, and Mitsubishi 215A



Use an inductive meter rated for at least 200A DC around the heavy Bk/Or alternator output wire while a heavy load is applied to the battery, and the engine is near 2000 RPM.



Preliminary checks to the charging system should be made regardless of the fault condition. These checks include:
1. Check battery posts and cable terminals for clean and tight connections. Clean the posts and the cables to ensure good electrical contact.

2. Check for secure connections at the generator output, generator case, regulator, and engine ground. Also check the connection at the load distribution point (starter relay).
. . .
3. Check the generator belt and belt tension.

4. Check the fuses/fuse links and wiring to the generator to ensure that they are not burned or damaged. This condition, resulting in an open circuit or high resistance, can cause erratic or intermittent charging system concerns.

5. Check the battery voltage. If the voltage is less than 12.3 volts with the engine and all accessories off, charge battery before proceeding.