Alternator/ Voltage Regulator

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Dondi12
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Alternator/ Voltage Regulator

Postby Dondi12 » Thu Apr 25, 2013 5:52 pm

Car died one afternoon. No clues before hand just died. Parts store guy said battery was no good. Bought new battery. Died next day on the way to school. Another parts guys said alternator over charging. Got it home and put my voltage meter on it. Without engine running registered 11.6. Started engine volt meter registered 11.3. Alternator not charging at all. So I replaced the alternator myself. Started engine voltage meter registered 11.5. Still not charging. What's going on? Could it be the voltage regulator? If so where is it?

Also, had a friend tell me that it could be a fuse. I opened the fuse box under the hood and noticed the "blue" fuse marked 100 was blown. So I tried to remove it. The fuse disintegrated in my hand trying to get it out. Cannot get it out at all except in pieces. I have virtually destroyed this fuse and it's still not out how do I get this 100 amp blue fuse out of the box?

Any help is greatly appreciated!


EriCCirE
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Re: Alternator/ Voltage Regulator

Postby EriCCirE » Thu Apr 25, 2013 6:37 pm

the blue 100 amp fuse is bolted in. Each side of the fuse legs have bolts through them, you need to take the plastic cover off, or bend it out of the way to get to them.

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Thu Apr 25, 2013 6:59 pm

Thanks
Any idea where the voltage regulator is? And how I can see if its working?

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Mkiisupra
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Re: Alternator/ Voltage Regulator

Postby Mkiisupra » Thu Apr 25, 2013 7:01 pm

Replace the fuse first then test again.

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Thu Apr 25, 2013 8:36 pm

Voltage regulator is within alternator

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Fri Apr 26, 2013 6:03 am

That's what I was afraid of. What are the chances of this being a bad alternator?
The alternator is really hard to get too!

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Fri Apr 26, 2013 8:21 am

Replace the fusible link first....

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Fri Apr 26, 2013 10:21 am

Another dumb question........would Auto Zone or Advance Auto have a fuse like this?

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Fri Apr 26, 2013 10:31 am

Either look on their website or call them

EriCCirE
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Re: Alternator/ Voltage Regulator

Postby EriCCirE » Fri Apr 26, 2013 3:56 pm

Go to a junk yard. Nearly all the same vintage infiniti's and nissan's have this 100amp fuse.

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Fri Apr 26, 2013 7:04 pm

Either way, it's a cheap part!

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Sat Apr 27, 2013 2:08 pm

Got another fuse. Cranked car to check alternator with amp meter. Still not charging amp meter reading with car running 11.3 before car was started reading was 12.4. Also, fried the new 100 amp fuse, got to get another. What's going on? Please help!

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Sat Apr 27, 2013 2:16 pm

You have a short somewhere, hate to tell you, remove alternator, look for bare wire where insulation is missing...have alternator bench-tested.

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Sat Apr 27, 2013 3:42 pm

the fusible link sits between the battery and the alternator, check for a loss of insulation between battery and alternator...or alternator is grounded internally = malfunction. Bench test and replace, it's not uncommon that rebuilt alternators are not properly tested.

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driverdriver
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Re: Alternator/ Voltage Regulator

Postby driverdriver » Sun Apr 28, 2013 6:41 pm

Are you running a Nissan new or rebuilt alternator? Aftermarket ones are known to cause all sorts of issues. In my years of moderating this forum, I know of only one J owner who has successfully run a non OEM alternator.

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Mkiisupra
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Re: Alternator/ Voltage Regulator

Postby Mkiisupra » Sun Apr 28, 2013 7:06 pm

Aftermarket alternators are fine. If you dont have actual experience using a product, dont comment about them. Ive been using a re-manufactured alternator from autozone for 3 years. The only reason it was replaced was previous owner using power steering fluid which leaked from the reservoir into the alternator.

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Sun Apr 28, 2013 7:34 pm

Funny you should say that. I have replaced the power steering pump 2 times in 2 years and I need to replace it again. But that's another issue.

J30tChumpCar
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Re: Alternator/ Voltage Regulator

Postby J30tChumpCar » Mon Apr 29, 2013 6:49 am

Check the installation carefully, you may have switched around the large ground and power wires

EriCCirE
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Re: Alternator/ Voltage Regulator

Postby EriCCirE » Mon Apr 29, 2013 7:42 am

driverdriver wrote:Are you running a Nissan new or rebuilt alternator? Aftermarket ones are known to cause all sorts of issues. In my years of moderating this forum, I know of only one J owner who has successfully run a non OEM alternator.
I have a high output 180 amp sitting on the shelf, waiting my summer stereo install :chuckle:

Hopefully, Lets make that 2 J owners

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Mon Apr 29, 2013 4:02 pm

J30tChumpCar, the best I can decipher is the main lug protruding out of the alternator is where the main wire goes. Is this not correct? There is also a smaller black wire I can't figure out where it goes. If I remember correctly it was attached to a bracket that I had to take off to get the old alternator out. Now II can't figure out how to put the bracket back on so I don't know where the black wire goes now.
This has to be a ground wire but I will have to lengthen it to be able to get to a bolt on the body.

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Mon Apr 29, 2013 9:09 pm

The black wire gets grounded to the chassis

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Mon Apr 29, 2013 9:11 pm

There should be a "B" stamped onto the alternator, where the Battery connection goes (B/R colored wire)...the black wire should attach to the alternator where an "E" meaning Earth or ground should be stamped onto the alternator, this black wire gets grounded to the chassis of the car.

Gerardjg
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Re: Alternator/ Voltage Regulator

Postby Gerardjg » Sat May 04, 2013 3:39 am

driverdriver wrote:Are you running a Nissan new or rebuilt alternator? Aftermarket ones are known to cause all sorts of issues. In my years of moderating this forum, I know of only one J owner who has successfully run a non OEM alternator.
The Auto Zone alternator I had in my 95 J lasted 4+ years 0ver 40,000 miles when it went Autozones life time warranty gave me a new one with no charge.

Dondi12
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Re: Alternator/ Voltage Regulator

Postby Dondi12 » Sun May 05, 2013 6:58 am

I ended up having to take the "new" alternator back off and go have it tested since I could find no other fault with the car. So through the process of elimination I had the alternator tested and it is faulty! Auto Zone replaced with no questions asked. I replaced (which is way harder than this process needs to be you have to be a contortionist to work on front wheel drive vehicles). Alternator is now working and all seems to be well. Car has 234000 miles and the power steering leaks like sieve. I have replaced the PS pump 2 times in 2 years and it's making that noise again. This car eats PS pumps for breakfast!
Thanks for all the help!

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Sun May 05, 2013 2:27 pm

The J30 is a rear wheel drive vehicle!
Anytime you buy a remanufactured alternator or starter you need to have it bench tested before leaving the store!

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Mkiisupra
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Re: Alternator/ Voltage Regulator

Postby Mkiisupra » Sun May 05, 2013 7:10 pm

Dondi12 wrote:I have replaced the PS pump 2 times in 2 years and it's making that noise again. This car eats PS pumps for breakfast!
What fluid are you using?

civi
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Re: Alternator/ Voltage Regulator

Postby civi » Mon May 26, 2014 9:22 am

@Dondi12, there’s a lot wrong with your car but whenever the car dies like this it’s mostly not the battery’s fault. It is always advisable to check if there is any shorting of some kind, if the alternator is working correctly, if there are any wiring disconnections. Replacing parts without a diagnosis seldom works, because unless the root of the problem is rectified, it can hit you again. Anyways, good to know that it works again now. Hopefully this alternator can handle the charging.

MunkeeKnuts
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Re: Alternator/ Voltage Regulator

Postby MunkeeKnuts » Tue Mar 27, 2018 3:15 pm

fourdrinie wrote:
Fri Apr 26, 2013 8:21 am
Replace the fusible link first....
Any ideas on how to upgrade the fusible link? I have a 1985 Nissan 720 and my fusible link clip (the copper clip that connects to the battery post) is broken. I cannot find this part anywhere! There's got to be an easy workaround for this simple part...

macgiver
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Re: Alternator/ Voltage Regulator

Postby macgiver » Tue Mar 27, 2018 4:52 pm

mac, I just posted a decent ,kind of long - winded post 5 minutes ago you should easily reference
" Battery fusible link" by ejski . Good luck G 3/27/2018

fourdrinie
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Re: Alternator/ Voltage Regulator

Postby fourdrinie » Tue Mar 27, 2018 10:19 pm



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