how much voltage should an alternator put out
Likes Received: 52. Trophy Points: 49. Location: Vernon BC. moneypit94 said: â. My alternator had a bad diode in so I had it rebuilt. Now the voltage is consistant but at idle its putting out 13.71 volts at the battery. I thought it should be at about 14.2. Watching the little dumby guage it doesn't move now at all with different rpms so thats good but i still feel its a little low.