A/C Current and Alt?
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Elder User
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A/C Current and Alt?
Trying to decipher what is the allowable amount of A/C current flowing back to batteries to which I would have a diode problem with alt?
I've been chasing down a pulsing in my headlights, gauges, etc. Just replaced alt with a new one and symptoms still exist.
This only occurs when the glow plugs are cycled off. On start up it does not happen while glow plugs are on.
Puzzled. Here.
Thx in advanced.
P.S. I have noticed a loopy idle also, like a miss that seems the lights and gauges pulse to. It doesn't change as RPM'so go up. Just steady.
I've been chasing down a pulsing in my headlights, gauges, etc. Just replaced alt with a new one and symptoms still exist.
This only occurs when the glow plugs are cycled off. On start up it does not happen while glow plugs are on.
Puzzled. Here.
Thx in advanced.
P.S. I have noticed a loopy idle also, like a miss that seems the lights and gauges pulse to. It doesn't change as RPM'so go up. Just steady.
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Have you measured for AC current Off the alternator post? The batteries will absorb most of this depending on how much, but, this could b doing some damage. The trick will be measuring properly and having the correct meter and settings so you don't ruin your meter equipment.
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Elder User
Joined: Dec 2000
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Have you measured for AC current Off the alternator post? The batteries will absorb most of this depending on how much, but, this could b doing some damage. The trick will be measuring properly and having the correct meter and settings so you don't ruin your meter equipment.
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Elder User
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Put the 140 Lg case 6G in. No fluctuations at all. Steady A/C MV with DC voltage at 14.29 at both batteries.
I had been running the 3G for over a year with no problems till 2 months ago??? Maybe the conversion pigtail is bad?? In any case, I'll see how this does and give an update later on. Maybe I'll upgrade to the Neville and keep this one as a spare.
Those running the Neville how has it been doing? Did you run an additional fuse? If so, what size.
Mhoefer; I see you're running the Neville, feedback on that unit.
Thx.
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Thx.
Lead Driver
Joined: May 2014
Posts: 6,545
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From: Virginia Beach VA
I'm running the NL 230... great alternator at a good price! Running no fuse, additional cabling was 2.0 welder cable and I went from alternator mounting bolt to body for the negative... that should give a deeper ground. Also added a 2.0 from drivers frame to block and the additional positive from alternator + to drivers positive and a 6' 2.0 from battery positive to battery positive. I'm a solid 14.2v from truck start-up until I turn the key off.
This is a big deal.... "cleaned all grounds and terminals."
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That ".15 on PS battery and .33 on DS battery" needs addressed. Add a 2.0 wire from positive to positive and that will minimize that loss.
I'm running the NL 230... great alternator at a good price! Running no fuse, additional cabling was 2.0 welder cable and I went from alternator mounting bolt to body for the negative... that should give a deeper ground. Also added a 2.0 from drivers frame to block and the additional positive from alternator + to drivers positive and a 6' 2.0 from battery positive to battery positive. I'm a solid 14.2v from truck start-up until I turn the key off.
This is a big deal.... "cleaned all grounds and terminals."
I'm running the NL 230... great alternator at a good price! Running no fuse, additional cabling was 2.0 welder cable and I went from alternator mounting bolt to body for the negative... that should give a deeper ground. Also added a 2.0 from drivers frame to block and the additional positive from alternator + to drivers positive and a 6' 2.0 from battery positive to battery positive. I'm a solid 14.2v from truck start-up until I turn the key off.
This is a big deal.... "cleaned all grounds and terminals."
I haven't run the additional positive to positive cable to both batteries thinking it was not all that necessary? I do have a 4g positive cable made up to install from alternator to positive post on PS but was going to install a 30 amp fuse between it. I do know that some are using a fuse and some are not with no issues. I have an extra ground 1/0 made up. I'll install it from at mounting bolt to frame. Additional cable from battery + to battery + will have to be made up.
Alt post to + battery post is not installed yet due to location of alt stud. I bought the 3g extension adapter but ran out time to install it. I was told I might have to take alt apart to put on. Not really crazy about that. Going to check other options on that.
I'll report back once the other cabling is completed.
Do you have any pics of your install?
Thx.
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Lead Driver
Joined: May 2014
Posts: 6,545
Likes: 14
From: Virginia Beach VA
this picture shows just the alternator, but. The negative on the mounting bolt goes to the body. The additional positive alternator goes to the PS battery +.
I used an eBay seller to buy a 1.0 AWG red colored marine grade tinned cable, came pre-made with tinned connectors. He can make any length you want and shipped fast.
http://www.ebay.com/itm/290774638618?_trksid=p2055119.m1438.l2649&var=590080451246&ssPageName=STRK%3AMEBIDX%3AIT
I used him to make 4 cables; 2 black at 2' each and 2 red, one 2' and one 6'. I mounted the two you see there and two additional cables were, DS frame to block w/2' black and battery DS+ to PS+ for the 6' red cable. Cleaned all grounds to bare metal and coated with a layer of battery/corrosion preventative, even Vasoline will work.
I used an eBay seller to buy a 1.0 AWG red colored marine grade tinned cable, came pre-made with tinned connectors. He can make any length you want and shipped fast.
http://www.ebay.com/itm/290774638618?_trksid=p2055119.m1438.l2649&var=590080451246&ssPageName=STRK%3AMEBIDX%3AIT
I used him to make 4 cables; 2 black at 2' each and 2 red, one 2' and one 6'. I mounted the two you see there and two additional cables were, DS frame to block w/2' black and battery DS+ to PS+ for the 6' red cable. Cleaned all grounds to bare metal and coated with a layer of battery/corrosion preventative, even Vasoline will work.
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
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Elder User
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I can remember not being able to sleep or working on my truck til 1 in the morning
Then couldn't wait to get home from work and doing it again. 
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