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Unread 04-16-2015, 02:21 PM   #1
StefanosT
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1994 YJ Wrangler 
 
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New alternator?

Hey Guys,

I have noticed my voltage slowly dropping in my jeep. I am not sure but I think the alternator is starting to go. I have a brand new battery in the car so I know its not that.

I am eventually planning on getting quite a few offroad lights as well as a winch. I was wondering if anyone could recommend an alternator to replace the stock one with? I figured if I'm changing it now I might as well put one in that will support all my future accessories.

I have included a pic of my voltage as well to make sure I'm not crazy.



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Unread 04-16-2015, 02:25 PM   #2
Jeepsr4me
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Dont trust that gauge.... get a meter and check voltage then...
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Unread 04-16-2015, 02:29 PM   #3
StefanosT
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Quote:
Originally Posted by Jeepsr4me View Post
Dont trust that gauge.... get a meter and check voltage then...
Well thats not good.... Not going to get a decent reading from that?
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Unread 04-16-2015, 02:40 PM   #4
Jeepsr4me
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its old and it could be bad.... I trust my volt meter.. if it confirms the bad ALt then replace it. There are better ones to use than stock also.
do a search for 136 amp one.
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Unread 04-16-2015, 02:50 PM   #5
StefanosT
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I'll use a volt meter see how that turns out. Any recommendations on a brand of alternator?
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Unread 04-16-2015, 11:40 PM   #6
Anticanman
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http://www.jeepforum.com/forum/f12/1...07/?highlight=
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Originally Posted by timatoe View Post
Hmm, that's kinda like asking how much is it to buy a red car....
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Unread 04-17-2015, 06:48 AM   #7
flcracker
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Quote:
Originally Posted by Anticanman View Post
this is the write-up I used to do that upgrade
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Unread 04-18-2015, 03:32 PM   #8
bergovoy
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1990 YJ Wrangler 
 
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it isnt a matter of 'trusting' the dash gauge or not... the meter maybe accurate, but it is measuring voltage from a different source/location...

get a meter and test the voltage at the battery... with the motor off, and then with the motor ON.... you can leave it connected while you start the jeep... watch it while starting the jeep.. it should 'dip/drop' a bit when starting.. but it shouldnt drop below 10v, during that starting.. if it does, the battery should get replaced, sooner, rather then later.

the battery should read 12.7v by itself... (or more)...

the alternator should test at 13.8 wile at 1500rpm (or so)...again, it can be higher...

it shouldnt be above 15volts, if so, your regulator is bad...



the dash gauge maybe lower then at the battery, as it is measuring the output after other devices are running, or if there are hsorts or loose grounds in the system...

anyways, good luck
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