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Ford 9N, 2N & 8N Discussion Forum
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12 Volt Conversion Tip

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Joe (IN)

02-10-2007 11:36:47




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I'm not much of a 12 volt advocate, but I do see that there is much frustration and confusion surrounding the proper way to connect the "excite" terminal on the GM alternators that are often used. While there are several ways to do it, for those that just want the thing to work with as little hassle as possible, I feel like the most reliable way to go is to use a diode in the excite line. This, however requires a trip to an electronics store and some soldering ability. While troubleshooting the ABS system on my Ford Ranger today, I ran across a diode in the underhood fuse box. It's a compact, prepackaged unit with male spades on the back of it. This piece would be super easy to install in a 12 volt conversion. No marker lights to burn out and no soldering. My fuse box had two of them and I would expect nearly every later model Ford to use them. Just something to thing about grabbing next time you happen to find yourself in a boneyard. I can get a Ford part# if anyone is really interested. Even from Ford, I'm sure they're pretty inexpensive.

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Hobo,NC

02-11-2007 07:05:44




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
Solder’in electrical suff is rite EZ if you have the rite solder. For electrical wires I use radio shack # (64-008-E) .062 dia. It melts like butter and does a fine job. That and a standard iron will git’R Done and you will be able to solder wif the best of’em. I have seen the dio you speak of but do not have enny info fer it. One tip on the other dios would be to keep bending/folding over the end till you git it to fit the connector then crimp. That would go for enny small gauge wire when you use a larger connector. I wuz once told by a radiator man (a good’in) that solder wuz a gentlemen to all metals long as it was clean.

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Bob

02-10-2007 20:04:30




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
It would be interesting to get the Ford part #, and check the price.

John Deere uses the same type of setup, part # 57M7326, @ $3.73. They plug into an the main fuse blocks on some of the newer tractors.

The ratings are 3 Amps, 600 Volts, not TOO shabby.

Of course, my "old standby" 1N5408's, @ about $0.50, aren't too bad, either.



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soundguy

02-10-2007 21:26:21




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 Re: 12 Volt Conversion Tip in reply to Bob, 02-10-2007 20:04:30  
RS sells a 25a bridge with blade terminals on it. Last I checked it was 2.50$. That could be used as the same, and if it burns out ( unlikely ) you have 3 more shots at it. Even has a hande screw hole thru the heatsink for mounting it... Heck.. I've used thos in place of cutouts on low - 'I' genny systems.

Soundguy



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dave guest

02-10-2007 18:25:59




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
Learn to solder in about 30min. Heat sinks and mechanical splices, western union, all. Handiest thing I ever learned.



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dave guest

02-10-2007 18:25:48




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
Learn to solder in about 30min. Heat sinks and mechanical splices, western union, all. Handiest thing I ever learned.



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DAVE2N(NYST)

02-10-2007 15:49:27




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
Thanks Joe(IN) Thanks for the insight. While I like my marker lamp as a visual on my 2N. The diodes will work on a 12v generator I use for charging batteries.



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Hec In Omaha

02-10-2007 15:05:40




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
Sounds like a good idea. As for myself I still like the 194 marker light. I bought a mini marker light sold in a truck stop for $2.00. Its about 2"l x 1"w x 1"d. I have it mounted just under the batt tray on the carb side of the tractor. I have had it in there now for 3 years and it is on the original bulb. I really like it cause its red and lets me know if I left the key on by accident. Every time I am done with "Jed" I look at the batt box to see if I see the Red Glow. No Glow = key off. I have caught myself at least a few times walking away with the key on.

My two cents.

Hec

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soundguy

02-10-2007 13:34:05




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 11:36:47  
Hmm.. let me think about all the burnt out marker lamps I've seen in recent years.. hmm.. ok.. none.. I don't see burt lamps as a huge problem.

Also.. using some small crimp on connectors on a diode is easy.. thus no soldering is needed.

However.. a blade socketed diode is a decent thing to have a number wrote down to. I wonder how many dollars or tens of dollars that 'assembly' is costing??

Soundguy

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Joe (IN)

02-10-2007 14:37:30




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 Re: 12 Volt Conversion Tip in reply to soundguy, 02-10-2007 13:34:05  
From the questions that have been asked about these conversions over the years, it is clear that not everyone has the electrical experience that you and I do. I just saw this as a quick, simple way to accomplish the excite function without needing to try to determine exactly what parts to buy or having to deal with mounting lights or effecting a durable installation of an off-the-shelf diode. This deal is plug and play. For someone willing to swing by an auto wrecker, they would be virtually free.

Oh, and I don't know if they last longer for you, but I worked on my sisters car a few weeks ago and found two blown dash light bulbs and two marker lights out. All the common 194's. The car is only a few years old and has a tick over 50K miles on it. I'm not impressed by their longevity and think their life would be shortened considerably in the vibration encountered on a tractor versus nestled in the dash or fender of a car with fully independent suspension and rubber powertrain mounts.

Regardless, I was only trying to help.

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soundguy

02-10-2007 21:12:03




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-10-2007 14:37:30  
I think you misunderstood the intent of my post.. it was not to discount your discovery.. but rather just the expression of an opinion.

It's been my exp that lamps that are 'dimmed' do not last as long as lamps run at intended brightness.

I have no empirical data to back this up.. just observation. Every dash lamp I've ever replaced was one that was ont he dash dimming circuit. I've only had to replace a few 194 marker lamps in the same time period where i have seenmultiple dash / dimmed lamp failures.

I would tend to agree with you on the vibration / harsh env issue.

oNE THING ONT HE EXCITER LAMP THOUGH.. IT'S UPTIME IS VERY SHORT, ASSUMING THE ALT WORKS. tHAT IS.. THE LAMP IS ONLY ON UNTIL THE ALTERNATOR STARTS CHARGING.. THEN CURRENT FLOW VIRTUALLY STOPS ( capslock.. darnit.. I hate this micro keyboard..) Anyway.. once the alt is charging.. lamp is out due to the voltage potentials being near identical on both legs... Vs a lamp in a car that probably sees quite a bit of 'up' time, and power cycles, vs a tractor. I generally start my tractor once per day.. and use it.. then put it up. i start my vehicle -many- times per day.. those power cycles I think decrease the life of the lamp far more than anything short of abusive handling.. etc.

I didn't mean to imple that your idea wasn't a suitable alternative, or didn't have merit. It just that I see the average non electrically inclined person as being equally 'afriad' of the automotive application diode as a store bought radio shack one.. and the issue of orientation.. Vs just buying a lamp bulb at walmart for 84 cents for a 2-pack and wireing them in.

By and far, most of the wire jobs I see on tractors makes me think that people should be required to have a license to own a set of dykes.

The average 'shade tree' mechanic is dangerous with a set of wre cutters....

The other 'plus' for a lamp is that you have a visual indicator of whether the alt is charging... I fhte lamp is lit.. it's a good sign that the battery is not charging. of course.. most people don't pay attention to their ammeter, ( or voltmeter) anyway.. i don't see them paying attention to a lamp much either...

As I said in my prev post.. i think you should go ahead and post the # of the diode.. there will undoubtly be people that would rather use a blade connector vs a crimp or solder connector on a barrel packaged diode.. etc.

Soundguy

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Joe (IN)

02-11-2007 14:14:50




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 Re: 12 Volt Conversion Tip in reply to soundguy, 02-10-2007 21:12:03  
Aw, fuhgedabowdit. Other events on this forum and another I am required to participate on for a class I'm taking have left me a bit edgy and on the defensive. I've got a buddy that works in the Ford dealer's parts dept. I'll see if he can scrounge me up a part# and price next week. I'll post a pic, too.



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soundguy

02-11-2007 18:06:00




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 Re: 12 Volt Conversion Tip in reply to Joe (IN), 02-11-2007 14:14:50  
For what it's worth. It's a neat concept. I gotta give you that. I guess, if someone is not around a electronics parts house, but they can get to a ford dealer.. or a napa.. then that would be a viable option.. even if it did cost more ( or less?? )

Hope you have a better day. I've had some stressfull ones lately too. Too much work and not enough daylight ( or sleep ) to go around.

have a good one.

Soundguy

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Stumpalump

02-10-2007 14:04:37




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 Re: 12 Volt Conversion Tip in reply to soundguy, 02-10-2007 13:34:05  
The Elitist has spoken.
These simple old tractors have been around a long time and it's very rare that sombody comes up with a new inovative way to do somthing. He is "the man" for comming up with a great new idea and you cut him to shreds.



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Tom N MS

02-11-2007 07:25:33




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 Re: 12 Volt Conversion Tip in reply to Stumpalump, 02-10-2007 14:04:37  
O.K. children get you a new lollipop and we can sit you in a corner, give you a feather and put some syrup on your fingers. Get a life..lets move on..



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soundguy

02-10-2007 21:18:04




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 Re: 12 Volt Conversion Tip in reply to Stumpalump, 02-10-2007 14:04:37  
Relaxe. i didn't cut anybody to shreds. i just posed an opinion. Is that ok with you? Should i have emailed you for permission first? ?

Looks like you are the one 'cutting' with your remarks.

I think I'll move along now and vist on some other boards.

Perhaps you can answer the inane electrical questions that get posed here day to day since I'll not touch them from now on.

Soundguy



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Stumpalump

02-11-2007 06:31:34




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 Re: 12 Volt Conversion Tip in reply to soundguy, 02-10-2007 21:18:04  
Hey Soundguy. Peace.



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soundguy

02-11-2007 18:06:02




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 Re: 12 Volt Conversion Tip in reply to Stumpalump, 02-11-2007 06:31:34  
Sounds good to me.

Have a good day ( night? ) It's 9pm est here.

Soundguy



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