i got a bad alternator(not to mention it was new not remanufactured) from advance auto parts. it was tested in the store and it was fine. so i put it on the car and a loud whining noise starts coming from the new alternator. so i have advance check it out and they tell me i have a bad diode on the new alternator. so then i put the old one back in so i can go back and forth to work and take the alternator back to advance to swap it out for a new one again. so they test the alternator that i just returned and they tell me that it is working fine. well i tell them that it's not working fine because my battery light came on with the new alternator and now it's off with the old alternator. so long story short, they exchange the alternator so now i will be putting another one on next weekend as well as a belt tensioner.
