Introduced in August 1964, Ford's first-generation Model 1G alternator was a real step up in reliability and current output compared to the old-school generators it replaced.

When they get hot, diodes pop, regulators clunk, and lights go out. That's why you need to consider the easy installation of a Mr. AMP single-wire alternator from Performance Distributors.

A failed diode often whines accompanied by reduced charging output. Have your technician test your alternator with an oscilloscope. It should show a straight, scalloped waveform with no weird spikes.

I have a Ford Focus 1.6 petrol (2001) and have recently been experiencing starting problems with it. I assumed it was starter motor, but now I'm not so sure as it started first time the following day, ...

If the voltage reading is in the 13.8 to 15.3 volt range, the alternator is working properly. More sophisticated testing ...