S2000 Under The Hood S2000 Technical and Mechanical discussions.

Is my alternator dead?

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Old 12-01-2010, 03:03 PM
  #21  
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awesome, il do that test later today.

thanks
Old 12-26-2010, 09:40 AM
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I'm having similar symptoms and my car wont start now

before... (when my car was running) my dash-lights would flicker at idle
yesterday I started my car up and the EPS light was flickering like crazy
so I turned the car off right after, and it hasn't started since
-unplugged and took the battery to be tested at Autozone, and it was bad
-installed new battery and same result

Car doesn't even crank over
Dash-lights don't even come up when I turn key all the way to on
Old 12-26-2010, 11:12 AM
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I had an issue earlier in the year and I wasn't sure if it was the battery or the alternator. Turns out it was the battery and the alternator output was fine but in the precess I did a test of the alternator and here is what I had. Hope this helps

Battery
before start up (all power off): 12.67V (dips to ~9.5V when starter is engaged).

With car on:

No electrical load:
At idle: 13.39V
At 3k RPM: 14.41V

Lights only on:
At idle: 14.26 initially then up to 14.32
At 3k RPM: 14.37

A/C only on:
At idle: ~13.5 initially then up to 14.19
At 3k RPM: 14.20

Both Lights and A/C on:
At idle: 14.02
At 3k RPM: 14.12

Turned power off and battery voltage started dropping into the 13's.
Old 12-28-2010, 10:26 PM
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Originally Posted by S2KennyT,Dec 26 2010, 01:40 PM
I'm having similar symptoms and my car wont start now

before... (when my car was running) my dash-lights would flicker at idle
yesterday I started my car up and the EPS light was flickering like crazy
so I turned the car off right after, and it hasn't started since
-unplugged and took the battery to be tested at Autozone, and it was bad
-installed new battery and same result

Car doesn't even crank over
Dash-lights don't even come up when I turn key all the way to on
Sounds like you need a new diode pack for your alternator. I had similar symptoms with the flickering dash lights and weakening battery until I replaced my diode pack on my alternator, I replaced the brushes too for good measure. HTH
By the way the alternator passed the Autozone test too with bad diodes. Don't trust their test for our alternators.
Old 12-29-2010, 04:30 AM
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Originally Posted by ronnuke,Dec 29 2010, 02:26 AM
Sounds like you need a new diode pack for your alternator. I had similar symptoms with the flickering dash lights and weakening battery until I replaced my diode pack on my alternator, I replaced the brushes too for good measure. HTH
By the way the alternator passed the Autozone test too with bad diodes. Don't trust their test for our alternators.
Where did you buy your diodes and brushes? Is this something that Honda sells? Did you replace the bearings while you had your alternater pulled apart?
Old 12-30-2010, 02:12 PM
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I got mine here:
http://www.hondaautomotiveparts.com/auto/j...TOR+%28DENSO%29

Parts number 3 and 8
Old 12-30-2010, 04:53 PM
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Originally Posted by adrian27,Dec 1 2010, 05:28 AM
which is the best car?Thanks
best thread jacker here. had me crackin up pretty good too lol
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