John Deere 6410 tractor won't start

[Tx Jim]

Thanks for correcting my MISTAKE. I guess I'll have to blame that mistake on my lack of knowledge of newer JD tractors & the JD parts catalog heading as it was listed under relay,starter but upon further investigation I read (OPPS) WIRING HARNESS, ENGINE STARTING AID
Thanks,Jim

 

[weezy22]

I realized that I did replace the Air Heater relay. I didn't even notice the Reply on the left side. Thanks a lot @zebrafive. I will go check it out immediately

 

[weezy22]

does anyone know how to access a wiring schematic for this tractor. I'm only getting 8.4 volts to the harness going to the neutral start switch.

 

[Industrial Toys]

Do the lights work, normally and brightly. On our OS 6200, they work regardless of the keyswitch. That might give some indication of connection integrity at the battery. Does the fuel pump work when the key switch is turned on? Usually when you hear the fuel pump, if you press the starter seitch for the preheat, the tone of the pump changes. Just little tests I would do before going farther.

 

[jd110]

Here is the starting circuit wiring. Hope you can read it. The quality is not great. What is the voltage to key switch when trying to crank?

 

[Tx Jim]

weezy22
Have you cleaned & tightened all 4 battery cable connections??

 

[Zebrafive]

does anyone know how to access a wiring schematic for this tractor. I'm only getting 8.4 volts to the harness going to the neutral start switch.

weezy22
Have you cleaned & tightened all 4 battery cable connections??

I am with Tx Jim, sounds like a bad ground connection. Look for other grounds that the just the battery, but start there first.

 

[Zebrafive]

Thanks for correcting my MISTAKE. I guess I'll have to blame that mistake on my lack of knowledge of newer JD tractors & the JD parts catalog heading as it was listed under relay,starter but upon further investigation I read (OPPS) WIRING HARNESS, ENGINE STARTING AID
Thanks,Jim

I agree navigating JD parts is not easy.

 

[Winch Fix it]

I had this problem with my JD 5820 on last service, I found that it was hard to track down the real electrical fault. But in the end I found that a bird had started biulding a nice little straw come stick nest inside the dash just behind the fuse board. I new that the bird crap on my bonnet was suspect! So I cleared this out of there with great effort bent double like a crooked person and to my amaze I found that it solved the problem. Simply the straw and sticks were shorting out wires crossing behind in the birds densely packed nest and I also was so relieved to spend an hour to remove the cretters nest as this was so close to a fire that I was nearly sweating think about my barn going up along with the tractor. So do check for foriegn objects in the system. Other wise it good be a technical fault in the wiring such as a smoked wire.