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Ford 9N, 2N & 8N Discussion Forum
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Phone Call for Dashboard Ammeter!

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A. Bohemian

09-08-2007 08:11:07




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Turn on your ignition without cranking. You should see three amps discharge on your dashboard ammeter. (This current reading will tell you everything voltage or resistance readings can tell you, and you obtain it EFFORTLESSLY and INSTANTLY every time you throw the switch!)

So throw the switch and look for a three amp discharge. But I suspect you won"t see any discharge, since you are seeing the full six volts across the coil primary.

This means (a) no current is flowing in the coil primary circuit, and (b) the fault is not between the battery and the coil connection where you are finding the voltage.

Either the coil primary is open, the coil terminals are not making good contact, the points are not closing properly (check the distributor for bushing wear), the points are defective (yes, they can be bad right out of the box), the points are not installed properly, or the ground connection for the points is no good.

Quote: "I Replaced Points, Condenser, Coil Ignition switch and the resister on the terminal block...Have worked on this issue for way to many hours and still have no spark."

You have learned an important lesson in Kettering ignition repair. Blindly replacing things rarely produces results. You must spend a little time first running tests until you FIND the bad component! "All else confusion..."

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Bob R

09-14-2007 18:58:33




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 Re: Phone Call for Dashboard Ammeter! in reply to A. Bohemian, 09-08-2007 08:11:07  
Well, I havent had a working ammeter since I bought the tractor. Guess I will have to get one and instaLL it for your test. As far as the wholesale addition of new parts they were added as other new parts did not solve the problem. I am not blessed with a lot of electrical test meters so I followed the path of lest expense to highest expense in replacing parts. The ignition switch was replaced due to loss of the old keys. I did purchase a relatively inexpensive volt meter which is how I found that the coil supply wire was giving the coil 6v. However, once the coil is assembled to the distributor the voltage at the top of the coil reads about 2v, which indicates the resistor is doing it's job ok. The only thing is that if I rotate the distributor shaft manualy (with the distributor fully assembled) I never see a fluctuation in the voltage. I thought I should see an increase to 6v whenever the points open. Is this correct? Any way I have found a mechanic who is about as old as I am who has had lots of experience with 8N tractors and he is going to bench trest the assembly for me and try to assess the problem. By the way, have you or any of the other guys had any experience with the electronic ignition conversion kits shown in the ignition parts lists on this web site? It looks like I can get a 6v kit for about $160. If it will work and be servicable for a significant period of time it may be worth it. I realy need my tractor to do work around my place.

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Jack - Illinois

09-08-2007 10:57:14




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 Re: Phone Call for Dashboard Ammeter! in reply to A. Bohemian, 09-08-2007 08:11:07  
A. Bohemian Says, "You have learned an important lesson in Kettering ignition repair. Blindly replacing things rarely produces results. You must spend a little time first running tests until you FIND the bad component! "All else confusion..."

Amen to that - I hate wholesale replacement as a fix!!!! If it ain't broke you can't fix it, so leave it be.



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