I usually do like Cab says. I just ohm it first to make sure its not open or shorted and then I test it with my AC voltmeter. I found most that read between 150 to 900 ohms are usually good and put out a strong enough AC signal. Course make sure the magnet is not missing or part of it broken off. Ron
_________________________
My car...63 Sport Fury Max Wedge wanna be street car..with new 493 pump gas full exh eng.......10.76 @ 124.49 ! ! ! My page on the cool 62-65 Mopar site ! http://www.1962to1965mopar.ornocar.com/mmo82008.html