Amp meter install issue

[fball1208]

So the tractor was converted awhile back to 12v. Today when starting the tractors like I do over the winter it started smoking and I found the wire pictured burnt what is proper wiring method for this? Why are coming from starter solenoid is on one side of the amp meter and a jumper wire is going down to that resistor block.

 

[fball1208]

It’s an 8n

 

[wore out]

So the tractor was converted awhile back to 12v. Today when starting the tractors like I do over the winter it started smoking and I found the wire pictured burnt what is proper wiring method for this? Why are coming from starter solenoid is on one side of the amp meter and a jumper wire is going down to that resistor block.

BEFORE

So the tractor was converted awhile back to 12v. Today when starting the tractors like I do over the winter it started smoking and I found the wire pictured burnt what is proper wiring method for this? Why are coming from starter solenoid is on one side of the amp meter and a jumper wire is going down to that resistor block.

The wire from the starter is battery power, the burnt wire goes to a terminal on the resistor block that acts as a common connection between the wire from the Ammeter, the wire to the ignition switch and the other to the charging system. Other than being in the same fiber block as the resistor it has NOTHING to do with the resistor.

Something other than the Ammeter (likely the charging system) put a heavy load on the circuit and the burnt wire appears to be a smaller gauge than the battery or charging system wire so it failed before the heavier wires.

You say it is 12 Volt conversion, does it have an alternator or a 12 Volt generator?

Is the Ammeter obviously damaged, glass smoked on the inside, pointer stuck/not centered, or electrically "open", or what lead you to asking about replacing it?

 

[fball1208]

It has a alternator , ammeter seems to be fine, no visible damage, it literally just smoked that jumper wire which was on the thinner side. It has been converted and running for about 2yrs now with a lot of use of the summer, weird it overloaded today. What can i look for before i go replacing the wire? just want to make sure i put back together right again, dont plan on replacing ammeter unless it doesnt work when i rewire it again

 

[deanostoybox]

Check the insulating bushings on the ammeter studs.

 

[Eman85]

What he said? If the wire terminal shorted the result would be a burned up wire like you have. Take it apart and see if the plastic washers melted or if the connector made contact with the metal bracket. This is why factory was inductive and many like a voltmeter.

 

[Bruce(OR)]

Google search
Jmor wiring diagrams
Available in color and ease of use.

 

[fball1208]

Thanks i will check that out, maybe ill look at changing it to a voltmeter. ill have to see if the factory one is in the box of 6v goodies i have.

 

[wore out]

Check the insulating bushings on the ammeter studs.

If the Ammeter had a short at one of it's studs it would affect the side with the wire from the battery, NOT the "downstream" side.

 

[HarryVanderpool]

Right off the bat, the wire connectors were improperly attached to the meter studs. They should be between the two nuts. Attached as they will let any little wiggle, short out on the meter or bracket.

 

[used red MN]

burnt wire appears to be a smaller gauge than the battery or charging system wire so it failed before the heavier wires.

Here is a link to a YT thread with the JMOR wiring diagram they are suggesting you follow. YT thread on 8N Wiring Adding to what woreout is saying, that jumper wire from the ammeter to the resistor/fiber block bottom terminal was probably 12 gauge or less. Should have been 10 gauge to match the wire on the opposite side of the ammeter going to the solenoid. And also matching what looks to be a 10 gauge wire coming off the junction terminal that is leading to the alternator. Likely while setting your battery ran down as it might be getting weak. Then when you started it the regulator raised up the charging amps to bring the battery voltage up quickly. The higher amperage going through the smaller gauge wire overheated it. I agree with the others you also need to investigate the insulator bushings on that holder clamp for the ammeter. Harry has given you the proper assembly order.

 

[Hobo,NC]

So the tractor was converted awhile back to 12v. Today when starting the tractors like I do over the winter it started smoking and I found the wire pictured burnt what is proper wiring method for this? Why are coming from starter solenoid is on one side of the amp meter and a jumper wire is going down to that resistor block.

Repair/replace the wiring ditch the amp-meter replace it with a voltmeter life will be good. If you would like to fuse the system use a piece of fusible link.

 

[fball1208]

Right off the bat, the wire connectors were improperly attached to the meter studs. They should be between the two nuts. Attached as they will let any little wiggle, short out on the meter or bracket.

Thanks. I didn’t do the original conversion another family member did. I’ll have to definitely address this !

 

[Jim L WA]

Thanks i will check that out, maybe ill look at changing it to a voltmeter. ill have to see if the factory one is in the box of 6v goodies i have.

I'm not sure what you're going to look for in the box of goodies, but an ammeter doesn't care what voltage the tractor is, so it probably wasn't changed out as part of the conversion.
From the photo you posted, I would replace all of the wiring. It's a mess.

 

[fball1208]

I'm not sure what you're going to look for in the box of goodies, but an ammeter doesn't care what voltage the tractor is, so it probably wasn't changed out as part of the conversion.
From the photo you posted, I would replace all of the wiring. It's a mess.

The ammeter was replaced I remember seeing the old one. I am going to change the wiring out and add a new key switch one on it is shot and is turned by a piece of a key.

 

[Eman85]

The ammeter was replaced I remember seeing the old one. I am going to change the wiring out and add a new key switch one on it is shot and is turned by a piece of a key.

Save yourself time and trouble and search on here for posts about key switches. Stick to NAPA or Standard brand switches.

 

[bluerooster]

When I converted my 2N to 12 volt, I just kept the original amp meter. I didn't even switch the wires, so it shows a discharge when it's charging.