alternator not working - Printable Version

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+--- Thread: alternator not working (/showthread.php?tid=2827)

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RE: alternator not working - Jack Houpe - 06-15-2025

That is good news!

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RE: alternator not working - Richard - 06-15-2025

Sparkalicious!

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RE: alternator not working - whited44 - 07-13-2025

Well I’m back to alternator problems again

Wednesday I put a new internally regulated levee Neville alternator on. I had to use an ignition source with the key on to make it charge. I used the “field” wire from the old external regulator and hooked it to the circled lug on the back of the alternator. 

Ran it for 2 hours on a trip and charged fine. However on the way home of wasn’t working. Got home and removed that wire and it no longer has 12 volts with the key on.  

1.  Is there a fuse for that regulator??  If so where might it be??
2.  I have it jumpered at the isolator for now and am putting a fuse on this wire. Does anyone see a problem with this work around
3.  Is there a different wire I should be using on the back of the alternator??  

I’m at my wits end with this thing. Have a big trip coming up and dont wanna end up stranded.

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RE: alternator not working - johnkosir - 07-13-2025

I don't know about yours, but on that generation of cars the alternator got energized in series through a light bulb, if the alternator stopped charging the light would turn on

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RE: alternator not working - whited44 - 07-14-2025

(07-13-2025, 10:48 AM)johnkosir Wrote:  I don't know about yours, but on that generation of cars the alternator got energized in series through a light bulb, if the alternator stopped charging the light would turn on

I think all new internally regulated alternators are “self exciting” now a days.

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RE: alternator not working - whited44 - 07-14-2025

I talked to Newell service today. They said that what I did will work with the fused jumper. Got a big trip coming up and don't want any problems.

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RE: alternator not working - [email protected] - 07-14-2025

(07-14-2025, 04:01 AM)whited44 Wrote:  

(07-13-2025, 10:48 AM)johnkosir Wrote:  I don't know about yours, but on that generation of cars the alternator got energized in series through a light bulb, if the alternator stopped charging the light would turn on

I think all new internally regulated alternators are “self exciting” now a days.

Yes, they are but I do believe they need a 12v source to start the excitation. So funny enough you need some voltage to start the charge. I think that is what is going on here, the isolator was blocking the voltage to the alternator, I am going to have to look at mine and see what they did to it because it seems to be working.

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