Alternator going out?

[LIGHTNINROD]

I just replaced my 2001 L's original battery. It had 99,000 miles and 5 years on it so I can't complain.

I put in a NAPA Orbital battery(thanks Chris) yesterday. I put my trickle charger on it since it had been several months since it was made. The charger brought it up to 13.4V. I checked its voltage after 60 miles or so of driving today and it had dropped back to 12.7V:shrug: .

I think my alternator is failing. I havn't had an alternator output test done on it yet. Is it failing IYO?


Dan

 

[Lightningfr]

normal

it should be about 12.7 for full charge

 

[LIGHTNINROD]

Thanks but for some reason, I remember from waaaaaay back that a fully charged 12V battery sould show 13.2 or .4V:dw: Have I mis-remembered my long ago Electrical class?


Dan

 

[ChrisNelson]

Do you have a Midtronics tester @ work?

 

[lightninmike]

When my alt went out i used a multimeter on the batt post to see what it was charging. With the dead alt it was only at like 10 and with the new alt it was 14 or close to it.
BTW where did you get that Napa batt??

 

[funair02]

When my alt went out i used a multimeter on the batt post to see what it was charging. With the dead alt it was only at like 10 and with the new alt it was 14 or close to it.

Yep

 

[ChrisNelson]

BTW where did you get that Napa batt??

:lol: :lol: Cut it out... :lol: :lol: :lol:

 

[LIGHTNINROD]

When my alt went out i used a multimeter on the batt post to see what it was charging. With the dead alt it was only at like 10 and with the new alt it was 14 or close to it.
BTW where did you get that Napa batt??

From here.


"Do you have a Midtronics tester @ work?"

Uh no, since I'm a stockbroker:lol1: .

Dan

 

[illness]

13-14v while running, 12v with engine off..is normal

 

[LIGHTNINROD]

13-14v while running, 12v with engine off..is normal

Thank you. I'll get someone to run it up above idle while I check the battery voltage.


Dan

 

[ChrisNelson]

"Do you have a Midtronics tester @ work?"

Uh no, since I'm a stockbroker:lol1: .

Dan

My bad, I got you confused with the guy from NAPA in Norwalk with a similar screen name.

We have a Midtronics MCR500 That runs a very simple test of the charging system 2 minutes and you have your answer. We do it free of charge for our customers, but I don't know if most stores do that or not.

 

[lightninmike]

:lol: :lol: Cut it out... :lol: :lol: :lol:

Come on now i thought it a good inside joke.;-)

 

[lightninmike]

From here.



Dan

Thanks:beer: