NOT on engines with ALTERNATORS

It will destroy the circuitry in the alternators (diodes,etc)

The practice was called exciting the generator.

Generators were discontinued in 1964

So no vehicles with alternators should have this done to them.

Topic:

Batteries can develop shorts inside themselves or sulfate.

The result is batteries that won;t hold a charge.

The Battery in a car/truck is like the Human heart.. if it ain't good..there's a problem

Take that battery in for testing at a shop.