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  1. #41
    Elite Member Don87's Avatar
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    Massey Ferguson GC2400

    Default Re: 1952 Ford 8N won't start

    Quote Originally Posted by 94BULLITT View Post
    I thought he was talking about the switch?
    No offense intended, but.............

    Soundguy has probably repaired more Fords than you and I have seen .............combined. Theres a time to talk, and a time to learn
    Don

    MF GC2400, FEL, 60in.MMM, 5ft. Cultivator, Single Bottom Plow, Bush Hog RTC48 tiller, MF 2360 front mount snowblower, 5ft backblade. BXpanded Piranha toothbar.

  2. #42
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    Ferguson T020, Kubota B3200

    Default Re: 1952 Ford 8N won't start

    Quote Originally Posted by majorbacon View Post
    Thanks, makes sense. If volt meter is across switch contacts and switch is open/off, it reads no voltage, if switch is closed/on and points are closed, voltage is 6 and if switch is closed/on and points are open voltage is minimal or 0.

    Have shorted switch with a jumper and still no spark.

    Any ideas for what to check next? Dist. has new points installed, gap set, installed, new coil, new condenser. All this due to no spark at plugs. Put to bed in December and never woke up, was running fine.

    So far nothing has yielded successful results. In past it was carb probs. and a rebuild solved them. This time, lack of spark at the plugs is the concern.

    Looking for any good ideas.
    If the switch is closed/on you will read no voltage across the switch. The meter is reading the "difference" in voltage so with the switch closed you are reading the same voltage ie 0 volts. When you open/off the switch you should read 6 volts because there will be 6 volts difference between the two points. I will try to attach a very crude drawing of what's happening...

    -switch-png

  3. #43
    Super Member 94BULLITT's Avatar
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    Frederick County, VA
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    Kubota BX2360 & L4240 HSTC

    Default

    Quote Originally Posted by Don87
    No offense intended, but.............

    Soundguy has probably repaired more Fords than you and I have seen .............combined. Theres a time to talk, and a time to learn
    That's a pretty good accusation to make for someone you don't even know. I think I am more than capable of getting a old tractor running. If the guy would have listened to the advice I gave in post 3 or 7 his tractor would be running. That is good advice for any old tractor/ car with no spark.
    Last edited by 94BULLITT; 10-06-2012 at 10:23 AM.

  4. #44
    Elite Member Don87's Avatar
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    Default Re: 1952 Ford 8N won't start

    Quote Originally Posted by 94BULLITT View Post
    That's a pretty good accusation to make for someone you don't even know. I think I am more than capable of getting a old tractor running. If the guy would have listened to the advice I gave in post 3 or 7 his tractor would be running. That is good advice for any old tractor/ car with no spark.
    No offense was intended from me, but the first thing you'll notice is that post number 3.........made by you was totally innacurate.............OP has negative ground.

    Post number 7, made by you, was totally overuled by Soundguy, where................I believe he show 5 instances(I would need to count), where your diagnosis was innaccurate, and required more troubleshooting.

    I wasn't trying to be a smarta**..............I just know when to turn the reigns over to the experts, that have been working on these since before you and I were born.
    Don

    MF GC2400, FEL, 60in.MMM, 5ft. Cultivator, Single Bottom Plow, Bush Hog RTC48 tiller, MF 2360 front mount snowblower, 5ft backblade. BXpanded Piranha toothbar.

  5. #45
    Super Member 94BULLITT's Avatar
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    What's with these guys and never posting back? Did the OP get his 8N running?

    Quote Originally Posted by Don87
    No offense was intended from me, but the first thing you'll notice is that post number 3.........made by you was totally innacurate.............OP has negative ground.

    Post number 7, made by you, was totally overuled by Soundguy, where................I believe he show 5 instances(I would need to count), where your diagnosis was innaccurate, and required more troubleshooting.

    I wasn't trying to be a smarta**..............I just know when to turn the reigns over to the experts, that have been working on these since before you and I were born.
    If you know anything about a 8n, they were all 6 volt positive ground. Most but not all 6 volts are positive ground. I really don't see were Soundguy said to do more troubleshooting than what I did in post 7.

  6. #46
    Super Member 94BULLITT's Avatar
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    Default Re: 1952 Ford 8N won't start

    Quote Originally Posted by Don87 View Post
    No offense was intended from me, but the first thing you'll notice is that post number 3.........made by you was totally innacurate.............OP has negative ground.
    They are positive ground

    scroll down to the bottom of the first table Old Ford Tractor Specifications and Data

    Click on the 4th page, (it is number 12 in the manual) 1948 Ford 8n: Ford 8n Specs

    Maybe I do know a little bit about what I'm talking about.

  7. #47
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    1947 Ford 8N 6v positive ground system front mount distributor sn 10101 all OEM

    Default Re: 1952 Ford 8N won't start

    Quote Originally Posted by moog View Post
    If the switch is closed/on you will read no voltage across the switch. The meter is reading the "difference" in voltage so with the switch closed you are reading the same voltage ie 0 volts. When you open/off the switch you should read 6 volts because there will be 6 volts difference between the two points. I will try to attach a very crude drawing of what's happening...

    -switch-png
    OK, so what if I read no voltage in both cases?

  8. #48
    New Member
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    Ferguson T020, Kubota B3200

    Default Re: 1952 Ford 8N won't start

    First, make sure you have your voltmeter set to DC volts and not AC volts, been there done that!

    I've found several different wiring diagrams of the 8N. One shows three wires on the key switch. The one from the battery you should see 6v to ground on that wire. If not then you have a broken wire, bad connection, bad wire end etc or a dead battery. This wiring diagram is the simplest one I found, although it appears some of it may be left out so I didn't include a link to it.

    The other diagram shows shows a wire from the terminal block to the key switch then a wire from the key switch to the coil. From the terminal side of the key switch you should see your 6v to ground. If not then again its a bad wire, bad connection etc. You need to follow the wiring backwards until you find 6v to ground then work your way back to the switch replacing the wire, the ends or whatever it may need.

    Heres a pretty good wiring diagram.

    Harper Farms - Morgan County Georgia

    Heres another of basically the same thing, although the first one appears to be a little easier to read

    8N FRONT MOUNT WIRING INFO-ORIGINAL 6-VOLT
    Last edited by moog; 10-07-2012 at 09:23 PM.

  9. #49
    New Member
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    1947 Ford 8N 6v positive ground system front mount distributor sn 10101 all OEM

    Default Re: 1952 Ford 8N won't start

    Quote Originally Posted by moog View Post
    First, make sure you have your voltmeter set to DC volts and not AC volts, been there done that!

    I've found several different wiring diagrams of the 8N. One shows three wires on the key switch. The one from the battery you should see 6v to ground on that wire. If not then you have a broken wire, bad connection, bad wire end etc or a dead battery. This wiring diagram is the simplest one I found, although it appears some of it may be left out so I didn't include a link to it.

    The other diagram shows shows a wire from the terminal block to the key switch then a wire from the key switch to the coil. From the terminal side of the key switch you should see your 6v to ground. If not then again its a bad wire, bad connection etc. You need to follow the wiring backwards until you find 6v to ground then work your way back to the switch replacing the wire, the ends or whatever it may need.

    Heres a pretty good wiring diagram.

    Harper Farms - Morgan County Georgia

    Heres another of basically the same thing, although the first one appears to be a little easier to read

    8N FRONT MOUNT WIRING INFO-ORIGINAL 6-VOLT
    Thanks for that, Will try that tomorrow. Looks like mine is wired to the switch like your second description, only two wire to switch and they both come from the terminal block with the ballast resistor on.

  10. #50
    New Member
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    Default Re: 1952 Ford 8N won't start

    After looking at the diagram again I used a bad description, told you wrong or just flat out lied to ya, however you choose to look at it, although it was accidental. Both wires do come from the terminal block. The wire from the ammeter to the terminal block should be your 6v to ground. The wire then goes through your switch back to the terminal block then over to the coil. Sorry for the confusion.

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