Where did you purchase the alternators? Discount stores are a poor choice because sometimes a core is cleaned and reboxed and sold as rebuilt. I have experienced 85% returns on alternators and starters. The only thing I buy from adiscount store I can pour out of a bottle. It's always the mechanics saying "pay me now or pay me later." I am a pro with a pros experience.
Also you need to check the grounds on the battery side. REMOVE all grounds that are attached to the engine, frame and engine to fire wall. Clean them GOOD so the metal is shiny on both surfaces. Sometimes a bad ground will cause an alternator overload in excess of it's rated output.
Saturday, May 6th, 2006 AT 1:03 PM