Supposed to check for it at the back of the alternator since the batteries can absorb some of the ripple. 2nd gen Dodge has a problem because the B+ wire from the alternator is run directly to the power distribution center sending ac ripple throughout the system before batteries can help absorb ripple. The B+ wire should be Taken out of the harness and run to the passenger battery not the PDC, with a much shorter run.
Others need to watch for diodes failing using this AC ripple test since having more electronics on newer trucks
Last time I heard tires don't burn ECM's, PCM's nor electronic board on top of the injection pump.
Did not mean to cause problems with this... just that everyone should be aware know an alternator that tests good for dc can be hurting sensitive electronics with ac volts noise in the system. Like said before, most alternator test stands do not test for AC ripple. The higher the (Amperage) demands placed on alternators means they should be checked for AC ripple with a good volt meter from time to time.
