How much amps should a alternator read???

Scootro

Founding Member

Jun 3, 2002

8

1

19

Arkansas

Sep 17, 2007

#1

• Sep 17, 2007

• #1

Well I think my 94’ lightning’s alternator might be on its last leg.

I tested my alternator tonight and it read about 30 amps shouldn’t it be reading a constant 45 or high amps????

Anyone got any suggestion on where I can get a direct replacement alternator with the stock 95 amperage????? I’ll regret replacing this with a oreilly or autozone alternator!

 

P

praugue

New Member

Sep 18, 2007

26

0

0

Sep 18, 2007

#2

• Sep 18, 2007

• #2

How are you testing this? The amount of amps is only what is needed.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Sep 18, 2007

#3

• Sep 18, 2007

• #3

I wondered about the testing method as well. A loaded test is required. Or maybe you're using an inductive meter to see idle output.

As far as the 3G, PA-P and Alterstart are two common choices for getting higher output 3G alts. You do have to do a little modification on a mustang to make them work (I don't know much about Lightnings).

Good luck.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,234

17,919

224

Massachusetts

Sep 18, 2007

#4

• Sep 18, 2007

• #4

You don't really go by amps as the alt will only output the amps needed.

Go by the voltage instead. If it's putting out 12V at idle and 14.4V+ above idle then it's putting out the proper juice.

Could be a junk battery causing a drain or short or just not holding the charge