A coil can be easily bench tested with a digital 10 megaohm impedance ohmmeter. Open the hood from the Ford 9N tractor, then disconnect both battery terminals. Remove all wires connecting towards the ignition coil and take away the coil from the harness. Switch on digital multi meter and switch its measurement dial towards the ohm setting.
How do you check the ignition coil on a ford 9N?
Connect the red (positive) probe of the multimeter to the outer, positive post of the ignition coil. The multimeter reads the resistance of the primary coil. If the reading does not fall in the range given by the Ford 9N service manual for your model year, the ignition coil should be replaced.
What does a bad secondary coil mean on a ford 9N?
The multimeter now reads the resistance of the secondary coil. An ohm reading not in the range specified in the Ford 9N service manual for the secondary coil means the ignition coil is bad. Related Articles
How do you test an ignition coil with a multimeter?
Connect the black (negative) probe of the multimeter to the outer, negative post of the ignition coil. Connect the red (positive) probe of the multimeter to the outer, positive post of the ignition coil. The multimeter reads the resistance of the primary coil.
What kind of distributor does a ford 9N tractor have?
Anyway, The early Ford 9N, 2N, and 8N tractors have a front distributor engine with a square-can coil that sits right on top of the distributor. The early square-can coils have never been as forgiving as the much more universal round-can type 6 or 12 volt coils and the replacement square-can coils seem to be getting worse.
How do you test a Ford tractor coil?
1:352:44How to Determine if your Tractor has Spark - YouTubeYouTubeStart of suggested clipEnd of suggested clipPlug. Set that on snap that on there. And then put this portion of your wire. Into the air and snapMorePlug. Set that on snap that on there. And then put this portion of your wire. Into the air and snap it on you'll pay attention to this part this is going to test the spark. And then also.
How do you test a Ford coil with a multimeter?
0:414:24How to check your ford modular coil on a 4.6- 5.4- 6.8 - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo simply put it on each one in depends on the end. And this one comes out to 1.8 ohms alright justMoreSo simply put it on each one in depends on the end. And this one comes out to 1.8 ohms alright just well Matt one more just to show you. I. Go 1.9 1.8 1.9 ohms is good and then when you have a coil.
How do you test a 12 volt tractor coil?
1:278:12Ignition Coil Test (The Short Version) - YouTubeYouTubeStart of suggested clipEnd of suggested clipThere's actually two coils that are contained within this canister here and on the the the high sideMoreThere's actually two coils that are contained within this canister here and on the the the high side or the secondary. Side you can go between either terminal on the primary.
How do you bench test a Ford coil?
1:446:59Bench Test Ford Coil Tower DG530 (Coil Pack); 1992 thru 2001 4.6L ...YouTubeStart of suggested clipEnd of suggested clipHead size ignition coil hold down bolts from the coil bracket. And then simply pull the coil up andMoreHead size ignition coil hold down bolts from the coil bracket. And then simply pull the coil up and out of the coil. Bracket. Like the title of this video says this is a bench. Test.
How many ohms should a Ford coil have?
The haines manual says for the Coil over plug that the Primary resistance should be 0.55 ohms and the secondary resistance should be 5,500 ohms. To test it disconnect the electrical connector from the coil assembly and connect an ohmmeter across the primary (+) terminal and the negative terminal.
How do you test an old Ford ignition coil?
0:435:08How to: Test any Engine Ignition Coil - Simple & Effective (not for current ...YouTubeStart of suggested clipEnd of suggested clipUsually we just got it hooked up to your spark plug here and ground it out and so how the coil worksMoreUsually we just got it hooked up to your spark plug here and ground it out and so how the coil works is when the secondary wire on your coil.
How do you check if a coil is good?
1:525:53How to Test Ignition Coils - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd simple test that can be done you use a circuit test which is also called a test lighting. AndMoreAnd simple test that can be done you use a circuit test which is also called a test lighting. And what you do you connect the negative up to the negative cable still disconnected.
How many ohms should a ignition coil read?
A typical value would read 0.4 - 2 ohms.
Can you test a coil pack with a multimeter?
Testing these coils for resistance via a multimeter is a good start, along with doing an inline spark test to be sure the coil is firing properly.
How can you tell if a Ford coil pack is bad?
Common Symptoms of a Faulty Coil PackA rough idle.An unexplainably louder-than-usual engine.A noticeable lack of power.A significant drop in RPMs while accelerating for no apparent reason.A blinking or intermittently activating check engine light.An active gas warning light when the vehicle has plenty of gasoline.More items...
How do you check coil resistance with a multimeter?
Turn your multimeter dial to the lowest ohms setting, usually 20 or 200. Place the two probes on the atomizer your coil is in, one probe on the positive pin (the one in the middle of the 510 connection), and the other on the outside 510 threading, to get the total resistance of the coil in the atomizer.
How can you tell if a Ford coil pack is bad?
Common Symptoms of a Faulty Coil PackA rough idle.An unexplainably louder-than-usual engine.A noticeable lack of power.A significant drop in RPMs while accelerating for no apparent reason.A blinking or intermittently activating check engine light.An active gas warning light when the vehicle has plenty of gasoline.More items...
Can you test a coil pack with a multimeter?
Testing these coils for resistance via a multimeter is a good start, along with doing an inline spark test to be sure the coil is firing properly.
How do you test a 2 wire coil on a plug with a multimeter?
1:094:21Testing A 2 Wire COP Ignition Coil - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnother method to test a two wire coil on plug ignition. Coil is simply to remove it from the sparkMoreAnother method to test a two wire coil on plug ignition. Coil is simply to remove it from the spark plug that it's sitting on top of put on a random one here.
How do you test a 4 pin coil with a multimeter?
2:464:53How to Test Toyota's Four Wire Ignition Coils (Low Tech) - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe other negative end is hooked up to the to ground on the battery terminal. You can also use aMoreThe other negative end is hooked up to the to ground on the battery terminal. You can also use a power probe to check that that's a quick way to determine.
How do you test a Ford tractor coil?
Place the end of the spark plug against a ground such as the engine block. Have someone crank the engine while you hold the plug against the block....
How do you test a 12v coil on an 8N Ford tractor?
Here comes the multimeter setting, set it to ohms. As there are two prongs Red & black, place the black one to the -ve terminal, and red to the +ve...
How do you test an old tractor coil?
1:312:44How to Determine if your Tractor has Spark - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe health of your coil. So once tha...
How do you test a 2n coil?
0:081:17Ford 9N 2N 8N Distributor Bench Test - YouTubeYouTubeStart of suggested clipEnd of suggested clipThen my negative cable which is black is g...
How do you test a coil pack on a Ford multimeter?
0:414:24How to check your ford modular coil on a 4.6- 5.4- 6.8 - YouTubeYouTube.
How to tell if a coil is bad?
As others have said, there are a few ways to see if a coil is bad, but it’s not possible to determine if a coil is good w/o some expensive testing equipment. If you detect a dead short or high resistance in the coil w/ an ohm meter, it’s bad. If it’s cracked, it’s bad. If a sidemount coil w/ battery voltage to the primary will not jump a ¼†gap from the secondary wire to the block, it’s bad. But, here is the hard part: even if you do not detect a short, even if it will produce a spark, even if it’s not cracked, that doesn’t mean the coil will work when it’s hot & under a load. So, it’s a process of elimination. If the tractor starts & runs fine for 30 minutes or an hour then cuts off & refuses to re-start, and you checked for spark at the plugs & it had no spark at all, AND you have the correct voltage at the coil that’s a good sign that you have a bad coil. Let it cool off, restart it & if you have a good spark, odds are it’s a bad coil. But, even then, you might end up w/ a spare coil on the shelf!
How many volts should a coil have?
Also, with the coil mounted on the distributor, key on, you should see 6 volts or more at the top of the coil with the points open and about half of that when the points close. That's not a test of the coil, but a test to see if the points are working.
How many ohms should a 12 volt pigtail coil have?
This may help. From the top of the coil to the pig tail should be around 1 ohm for 6 volt and 2-3 ohms for a 12 volt. From the top of the coil to the tab (cap contact) should be around 6 K ohms.
Can a 12V coil go bad?
Too much current creates heat which melts the insulation. Insufficient resistance in a 12v conversion will do the same thing. Rarely do coils just “go bad.â€
Do coils go bad?
Bottom line.......coils do go bad, but I'll venture a guess that 75% of new N coils sold today are sold to folks who do not understand how to diagnose a poor spark problem or how a coil works. So, for those who don’t know any better, in a no spark situation the first suspect is usually the coil……and, more often than not, it isn’t the problem.
Can you use coil wire post to kill spark?
You can use this method with the coil wire post and some kind of gap between ground. Once you get the principal of the ignition down you can isolate and test the other things that can kill spark like burned points, condenser or a break down in the trigger wire.
How many ohms should a 6 volt coil be?
Stick an ohmmeter across the low voltage terminals of a few replacement coils and it quickly becomes obvious that there is a lot of variation in them. The 6 volt coils usually measure from 0.5 to 1 ohm. The 12 volt coils measure anywhere from 1 to 3.5 ohms. Any 12 volt coil that measures less than 3.0 ohms should be run with the original ignition resistor and possibly a second resistor in series. A 6 volt coil should definitely be run with the original resistor plus a second resistor in series. Sadly, I cannot tell you the size for the second resistor or if one is required. The coils are inconsistent. Every time we replace a coil we should be checking to make sure the ignition resistance is correct for that particular coil. Any 6 or 12 volt coil can be made to work in a 12 volt tractor.
What kind of coils are used in tractors?
Anyway, The early Ford 9N, 2N, and 8N tractors have a front distributor engine with a square-can coil that sits right on top of the distributor. The early square-can coils have never been as forgiving as the much more universal round-can type 6 or 12 volt coils and the replacement square-can coils seem to be getting worse. The late side-distributor 8N tractors were upgraded to the more universal round-can coils. More applications for a particular part usually means the part has to be made more forgiving of individual variations and it tends to keep the cost low because they sell more of them. The round-can coil is in a metal can and the electrical guts are in oil. This is a MUCH better design for getting rid of excess heat than the plastic case and potting compound used in the front mount coils.
Why are 12 volt conversions bad?
I believe the main reason many 12-volt conversions are having ignition problems such as weak spark or burned coils is directly related to the weaker square-can coils and the less-reliable replacements we are getting. Buying a 12 volt conversion kit is no guarantee of success. There is a lot of competition in the marketplace and the pressure to keep prices down forces conversion kit builders to shop around for their parts. Also, what works for one person, and the coils they happen to be buying, may not work for another person in a different part of the country.
What is round can coil?
The round-can coil is in a metal can and the electrical guts are in oil. This is a MUCH better design for getting rid of excess heat than the plastic case and potting compound used in the front mount coils.
Can you convert a tractor to 12 volts?
Many people have converted their old tractors to 12 volts with little or no problems and are completly happy with the results. This page is provided as an information resource for those individuals who have not been so fortunate. Hopefully, the information on this page will help get the 12 volt systems working for some of the many people who are having ignition problems with their converted tractors. I will attempt to keep the technical engineering jargon to a minimum.
