Herman3

I sent you a response, I didn't hear from you so I am not sure if it was my fault. Any way most people don't know there are extra heave diodes and regulators for most alternators, I can supply both parts if you would like. My email is htrujillo3@comcast.net if I can help let me know. Save your money and stick with the 21/22 SI

I would like to see one of the alternators that went bad to help correct your problem also what alternator are you using? If you can give me a part number.

You need to check for a poor connection, check the voltage at the back of the alternator when you first start the engine, when the voltage drops retest, if the voltage is low the trouble could be in the alternator if the voltage is normal ( 13-14 volts) you could have a bad connection this could be in a number of places.