Battery light flickers

Tiny
WILLIAM.SNIDER
  • 2005 SCION XB
  • 72,000 MILES

My car starts sometimes but then sometimes doesnt start. When driving in all gears my battery light flickers. I just installed a new alternator to fix the starting problem. The battery light problem just occoured with installation of the new alternator. I tested my batter and its fine. I also get a whining noise when I turn on the fan weather its heat or air its still whines. It also tries to stall more when the air is on or when the radio is turned up.

Do you
have the same problem?
Yes
No
Tuesday, October 4th, 2011 AT 6:02 PM

12 Replies

Tiny
ASEMASTER6371
  • EXPERT
  • 25,509 POSTS

When it did not start, was the battery dead?
How did you test the battery?
Did you use a new or used alternator?
The flickering light is either a bad connection or a bad diode in the new alternator.
The whinning noise is bearings in the blower fan motor. No lube points, just replacement.
The stalling is a whole other issue. It may need a idle re learn from you having the battery disconnected or it may have other issues.

Roy

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 7:47 PM
Tiny
WILLIAM.SNIDER
  • MEMBER

About half the time it doesnt start so I would put it in gear and push a little and retry till it starts.
I used a volt meter and checked the correct amout of voltage a battery should be pushing and it was good.
Its a new alreanator 90 watt.
How would you do an idle re learn to see if thats the issue?

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 8:26 PM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,509 POSTS

What was the voltage? Did you mean 90 amps?

Roy

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 9:46 PM
Tiny
WILLIAM.SNIDER
  • MEMBER

Yea I went 90 amps and just checked the battery voltage again it's at 12.4 w/ car off

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 10:07 PM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,509 POSTS

What is it running? 12.4 is low, fully charged is 12.6

Roy

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 10:12 PM
Tiny
WILLIAM.SNIDER
  • MEMBER

While running it's 13.5

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 10:28 PM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,509 POSTS

Thats too low. Should be 14-14.5 volts. Is it new or used?

Roy

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 10:37 PM
Tiny
WILLIAM.SNIDER
  • MEMBER

It's was supposedly new when I got the car and I got it 2 months ago, when I changed the alternator on Friday autozone and o'reilys checked it and said it was good and it had the same problem but I'll head there after work and let them do it again just to see if it's that

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 10:55 PM
Tiny
WILLIAM.SNIDER
  • MEMBER

Autozone just said it was fine so now I have no idea at all unless it's a ground somewhere cuz I've already ran the battery cables and made sure they were fine yesterday and my belts and pullys are clean so I have no ideas what it could be

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 11:03 PM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,509 POSTS

Go over all your connections.

Was this
answer
helpful?
Yes
No
Tuesday, October 4th, 2011 AT 11:49 PM
Tiny
WILLIAM.SNIDER
  • MEMBER

OK cables are all connected tight and it doesn't seem to be them cuz I can jingle them and everything is fine so I don't think any wires are bad cuz nothing happens so I'm gonna take the alternator off and take it back and swap out for another and see if it was just that one tomorrow

Was this
answer
helpful?
Yes
No
Wednesday, October 5th, 2011 AT 2:46 AM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,509 POSTS

Good idea

Roy

Was this
answer
helpful?
Yes
No
Wednesday, October 5th, 2011 AT 4:00 AM

Please login or register to post a reply.

Related Battery Light Content

Recommended guides