Wiring help,,,,,,Please

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Telephoneman
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Wiring help,,,,,,Please

Postby Telephoneman » Sun Mar 08, 2015 3:57 pm

!953 farmall Cub.Bought this tractor last fall,over the winter I tore it down,cleaned and repainted.Wish I had made a wiring drawing because it started and ran perfectly.I have something wrong while re-wiring.Turns over great but no spark now.Hopefully someone can see what i have messed up.I've looked at the wiring to the point where my thinker is burned out. :lost: Any help would be so appreciated.Enclosed is a drawing of what I have at this moment.
Gary
Oswego,NY
Attachments
farmall wiring diagram0004.jpg

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BIGHOSS
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Re: Wiring help,,,,,,Please

Postby BIGHOSS » Sun Mar 08, 2015 4:08 pm

Look at the top of this page under "Rudi's Manuals" for Bob Melville's wiring diagrams. Looks like #5 diagram is the one you want.

Have you hooked a jumper wire from + battery post to + side of coil to see if it will fire then?
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Eugene
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Re: Wiring help,,,,,,Please

Postby Eugene » Sun Mar 08, 2015 4:57 pm

http://s101.photobucket.com/user/farmal ... sort=4&o=3

Above link to the wiring diagram. Wiring diagram is titled for H and M but is the same for Cubs.
I have an excuse. CRS.

torchred89
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Re: Wiring help,,,,,,Please

Postby torchred89 » Sun Mar 08, 2015 7:03 pm

Image

Eugene
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Re: Wiring help,,,,,,Please

Postby Eugene » Sun Mar 08, 2015 7:13 pm

Initial poster's sketch indicates a 12 volt alternator, probably the Delco 10SI. Could be the Hitachi.

The tractor has been converted from 6 to 12 volt, per the sketch.
I have an excuse. CRS.

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John *.?-!.* cub owner
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Re: Wiring help,,,,,,Please

Postby John *.?-!.* cub owner » Sun Mar 08, 2015 10:03 pm

According to your diagram you should have spark. Get a test light or voltmeter and connect to ground. With ignition switch on you should have voltage at + (resister side) of coil. If not, check each side of coil, then ignition switch to see where you are losing it. Once you have voltage to coil you should see voltage when points are open, and NO voltage when the are closed. Light should flash there or if meter it should jump back and forth (digital meter not very good for that part, it will just go goofy). If no voltage at distributor side ( - ) any time, disconnect wire between coil and dist. If still no voltage try another coil. If voltage then, check for a shorted insulator post on distributor, bad condenser, or points stuck shut. If voltage all the time at distributor side of coil check for broken wire, points not closing, or points corroded a little and needing filed with point file.

All of this is assuming you are not getting any fire coming out the center lead on coil going to distributor.
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Denny Clayton
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Re: Wiring help,,,,,,Please

Postby Denny Clayton » Mon Mar 09, 2015 9:35 am

You say you cleaned and repainted everything. Proper grounds and connections require bare shiny metal contact.
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Re: Wiring help,,,,,,Please

Postby staninlowerAL » Mon Mar 09, 2015 9:45 am

Denny Clayton wrote:You say you cleaned and repainted everything. Proper grounds and connections require bare shiny metal contact.

:Dito: Most of the circuits are grounded through the frame of the tractor. Paint will act as an insulator and the circuit will be "dead" if not cleaned to "shiny bright metal".

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Dale Finch
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Re: Wiring help,,,,,,Please

Postby Dale Finch » Mon Mar 09, 2015 9:49 am

Denny Clayton wrote:You say you cleaned and repainted everything. Proper grounds and connections require bare shiny metal contact.

That was my thought, too. It hurts to do it, but you may have to disassemble a few things enough to scrape, sand, or grind off paint to get to SHINY metal at EACH wire/compnent connection point. Remember that the tractor CHASSIS is your overall "ground wire".

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Gerry Powell
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Re: Wiring help,,,,,,Please

Postby Gerry Powell » Mon Mar 09, 2015 10:43 am

Gary,
You have several wires wrong,
first, move the wire that goes from the starter to the amp gauge(terminal shown on the right side of the gauge) to the other terminal of the gauge(terminal shown on the left side of the gauge), this wire needs to be at least 10AWG, this is the charging path from the alternator to the battery. The wire you have shown from the alternator "B" terminal to the gauge also needs to be at least 10AWG.
second, move the wire that is shown from the ignition switch to the left shown terminal of the gauge to the other side of the gauge.
third, remove the wire from the battery to the switch. This way the switch gets it's power thru the gauge and will show discharge from the current drawn by the coil when the switch is on.
fourth, move the wire from the ballast resistor to the switch to the other side of the switch.
The way you have it wired the gauge would not show you charge or discharge from the battery but should give you spark. I'm thinking your switch is bad since it tried to connect the alternator to the battery and may have burned open.
I've included my diagram for a Hitachi alternator, pretty much the same
Hitachi_conversion.jpg

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Telephoneman
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Joined: Fri Feb 10, 2012 12:48 pm
Zip Code: 13126
Tractors Owned: 1945 Farmall A
1946 John Deere H
1974 AC 412
2010 John Deere x540

Re: Wiring help,,,,,,Please

Postby Telephoneman » Mon Mar 09, 2015 4:32 pm

Many thanks to all that replied.I have this weekend off and hope to put your info to use.
Gary

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Telephoneman
5+ Years
5+ Years
Posts: 13
Joined: Fri Feb 10, 2012 12:48 pm
Zip Code: 13126
Tractors Owned: 1945 Farmall A
1946 John Deere H
1974 AC 412
2010 John Deere x540

Re: Wiring help,,,,,,Please

Postby Telephoneman » Mon Mar 16, 2015 5:06 pm

Many,many thanks to all that replied.I found a combination of problems.Some wiring and a painted over ground. :thanx: :worthy:
Gary

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John *.?-!.* cub owner
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Re: Wiring help,,,,,,Please

Postby John *.?-!.* cub owner » Mon Mar 16, 2015 9:34 pm

Telephoneman wrote:Many,many thanks to all that replied.I found a combination of problems.Some wiring and a painted over ground. :thanx: :worthy:
Gary

From one telephone man to another, you should find a bad ground right off. :lol:
If you are not part of the solution,
you are part of the problem!!!


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