John Deere 6400 electrical problem (pto)

[Northeastfarmer]

We have a 1996 John Deere 6400 and when you engage the pto it blows the pto fuse (f119)
Have checked the switch, pto solenoid and speed sensor wires. We can’t find the rear pto relay.
Have had the panel off alongside fuses and three top panels above the fuses but no sign of it. Can’t find where switch wires, pto solenoid and speed sensor wires connect to, the tractor does not appear to have a seat switch.
Any help greatly appreciated

 

[Northeastfarmer]

 

[Northeastfarmer]

Anyone?

 

[Blue.]

We have a 1996 John Deere 6400 and when you engage the pto it blows the pto fuse (f119)
Have checked the switch, pto solenoid and speed sensor wires. We can’t find the rear pto relay.
Have had the panel off alongside fuses and three top panels above the fuses but no sign of it. Can’t find where switch wires, pto solenoid and speed sensor wires connect to, the tractor does not appear to have a seat switch.
Any help greatly appreciated

have you tried it with the solenoid unplugged?

 

[Phil P]

I seem to think that a 96 will be a pre BCU model? In which case there will be 2 or 3 small relays at the bottom of fuse box that work the pto.
I’d start by unplugging the pto solenoid and see if it still blows the fuse if it does i’d continuity test the live wire at the solenoid and see if it’s grounded. Chances are if it’s not the solenoid it will be a wire rubbed through on a machine that age.

 

[Northeastfarmer]

have you tried it with the solenoid unplugged?

Yes tried it and it doesn’t blow the fuse but obviously the pto isn’t working

 

[Phil P]

Yes tried it and it doesn’t blow the fuse but obviously the pto isn’t working

If it doesn’t blow the fuse with the solenoid unplugged then the coil has gone. You could swap it with the mfwd or diff lock to get you going.

 

[Northeastfarmer]

If it doesn’t blow the fuse with the solenoid unplugged then the coil has gone. You could swap it with the mfwd or diff lock to get you going.

Thank you I’ll try that

 

[livestock 1]

If it’s like the Deutz swapping the solenoids will work but they are different solenoids
Pto is a feather start the diff ones on and off would knacker something if you keep using it that way

 

[Phil P]

If it’s like the Deutz swapping the solenoids will work but they are different solenoids
Pto is a feather start the diff ones on and off would knacker something if you keep using it that way

All same solenoid on the early jd’s so can swap them about. Although the mfwd one on some later models has a bigger coil. Also you now have to buy a one piece unit/replacment (coil/valve) so can’t just swap the coils around.

 

[Northeastfarmer]

If it doesn’t blow the fuse with the solenoid unplugged then the coil has gone. You could swap it with the mfwd or diff lock to get you going.

Well please to say that the pto is working after doing as you suggested and swapped the diff lock solenoid with the pto solenoid, so thanks.

next question is would you or anyone recommend purchasing a new solenoid off eBay for £170 or one from John Deere for £430….

 

[livestock 1]

Well please to say that the pto is working after doing as you suggested and swapped the diff lock solenoid with the pto solenoid, so thanks.

next question is would you or anyone recommend purchasing a new solenoid off eBay for £170 or one from John Deere for £430….

There is places that fix them but won’t cost a lot I don’t know where these places are

 

[Tractortech]

Now Then..
If you swapped solenoid coils, I assume you have the early type where you can get a new coil??
RE50782 - Coil is £156.03 from your dealer, less possibly if you ask nicely. Item 20 in the picture..

 

[livestock 1]

Or ring Darlington rewinds see what their crack is even for future reference

 

[Northeastfarmer]

Now Then..
If you swapped solenoid coils, I assume you have the early type where you can get a new coil??
RE50782 - Coil is £156.03 from your dealer, less possibly if you ask nicely. Item 20 in the picture..

thanks for that I’ll ring them Monday