Battery light flickering

WILLIAM.SNIDER

MEMBER
2005 SCION XB
72,000 MILES

When im driving my car and I give it gas around 3k rpms the battery light will flicker and it will***** and try to die, the battery and alternator was tested at autozone and they said it was fine and that was at numerous stores. I have no idea where to even look to see what the problem is.

4 Replies

RIVERMIKERAT

MECHANIC
6,110 POSTS

Use a multimeter to check the alternator output. It should be between 13.8 and 14.2 volts. It could be the rectifier diode in the alternator getting ready to go bad.

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Monday, October 17th, 2011 AT 4:55 AM

RASMATAZ

MECHANIC
75,992 POSTS

Could be the computer controlled of the alternator's fiel generation circuit

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Monday, October 17th, 2011 AT 4:59 AM

WILLIAM.SNIDER

MEMBER
9 POSTS

It's a brand new alternator just put it on 2 days ago myself and it's pushing 14.1, I also found out that the battery light flickers but the car doesn't try to do if the head lights are off but if they are on or the fan or radio is on high it will***** and try to die

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Monday, October 17th, 2011 AT 5:40 AM

RIVERMIKERAT