Brake and Battery light

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07-05-2019, 03:23 PM

Woody91557

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Brake and Battery light

Hi, My 2003 I35 had both of these lights on then when I let the car rest a bit they were off?

07-05-2019, 04:16 PM

JSutter

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The alternator is failing.

07-05-2019, 05:44 PM

Woody91557

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Wow really just had that put in like 10 months ago....??? This is actually the 2nd one first replacement had a bearing go within 2 months could something be eating these?

Last edited by Woody91557; 07-05-2019 at 05:53 PM. Reason: add

07-06-2019, 05:18 AM

Turbobink

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Quote:

Originally Posted by JSutter

The alternator is failing.

+1 ... classic symptom.

07-06-2019, 05:47 AM

Woody91557

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Made in China Alts? Seems to me they should last longer than that.

07-06-2019, 10:49 AM

Turbobink

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Quote:

Originally Posted by Woody91557

Made in China Alts? Seems to me they should last longer than that.

Test it ... test the whole charging system for that matter.

07-06-2019, 12:07 PM

Woody91557

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Put a volt meter to it 14.5 running 12.5 when not. She drove it today and no light. I'm hoping it was an anomaly

I guess wait and see.

Last edited by Woody91557; 07-06-2019 at 12:10 PM. Reason: add

07-06-2019, 12:59 PM

Turbobink

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Quote:

Originally Posted by Woody91557

Put a volt meter to it 14.5 running 12.5 when not. She drove it today and no light. I'm hoping it was an anomaly

I guess wait and see.

With the car running, was that with the A/C and headlights on?

07-06-2019, 01:10 PM

Woody91557

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No, Need to put a load on it? I will try that thanks.

07-06-2019, 03:06 PM

#10

Woody91557

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Just tried it still got a 14.5

07-07-2019, 04:34 AM

#11

Turbobink

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The last thing I’d do would be a voltage drop test across the charge cable.

If that tests good, I’d maybe agree your trouble lights were a fluke.

07-08-2019, 12:04 AM

#12

DennisMik

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Check that the belt is not cracked and/or worn and that it is tight. A belt that is not fully tight can slip when it gets wet but work OK when dry.

07-08-2019, 04:42 AM

#13

Woody91557

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OK, The belt seems fine it was put on new along with the Alt. but I was thinking the same. Don't want it to be the alt. again!

Last edited by Woody91557; 07-08-2019 at 04:43 AM. Reason: add

07-15-2019, 04:49 PM

#14

Woody91557

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Just a quick update still no light!!

07-16-2019, 05:03 AM

#15

I35GEEK

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Same thing happened to me. I had my alternator replaced by a mechanic. It died in a year. I realized that it was a remanufactured alternator that he put in. The second time around, I found an alternator on amazon (new not remanufactured). That second one is now 3 years old and has over 30,000 on it. So if you have been using remanufactured alternators, you may want to look at new. I heard all kinds of problems with remanufactured alternators.