John Deere 6400 starter problem

[Northeastfarmer]

I have a jd 6400 with starting problems.
Fitted a new ignition switch and relay on the end of the starter motor.
The tractor starts if you short it across the terminals on the relay with a screwdriver.
There’s 12.8 v across the relay when trying to start it but there is no voltage on the small centre third wire on the relay.
Also tried running power from the positive terminal on the battery to the third small wire on the relay with no success….have by passed the neutral switch.

many advice welcomed thanks

 

[Tractortech]

I have a jd 6400 with starting problems.
Fitted a new ignition switch and relay on the end of the starter motor.
The tractor starts if you short it across the terminals on the relay with a screwdriver.
There’s 12.8 v across the relay when trying to start it but there is no voltage on the small centre third wire on the relay.
Also tried running power from the positive terminal on the battery to the third small wire on the relay with no success….have by passed the neutral switch.

many advice welcomed thanks

NEVER bypass the neutral switch..... Danger of death!!!

Now Then..
Do you have 12v at wire 300 (black) on the neutral start switch?? Also, do you have continuity along wire 506 (blue) from the neutral start switch to the start solenoid.
Touching 12v onto the start relay terminal with the blue wire should fire the starter... is the start solenoid earth working correctly?? I always prefer a test light/bulb rather than a multimeter..
Don't get run over while doing all this!!..

 

[cousinjack]

When you say short across the terminals.. do you mean the two big ones which result in a massive spark before turning the starter ??

is the relay clicking when you turn the key ? You say there’s 12v across the relay but it doesn’t do anything ? So it would seem your relay unit is still at fault.

running a live wire to the small spade on the relay should operate the starter

assuming you have checked the earth supply to the relay ??

 

[flywheel]

If I have starter problems, I just replace starter motor etc .....but remove starter & see if it actually works off the tractor ...& check battery is 100 % working ...

 

[Qman]

I would recommend you get a Mahle gear reduction starter from AC Engineering of this parish. It will transform your tractor and you will be happy every time you turn the key.

@ACEngineering

 

[Netherfield]

I would recommend you get a Mahle gear reduction starter from AC Engineering of this parish. It will transform your tractor and you will be happy every time you turn the key.

@ACEngineering

Even a Mahle starter won't work if the fault is in the connections to it.

 

[ridger]

Even a Mahle starter won't work if the fault is in the connections to it.

Never thought of that lol

 

[ACEngineering]

Even a Mahle starter won't work if the fault is in the connections to it.

BUT i sell bluetooth starters no need for wires

 

[ACEngineering]

I would recommend you get a Mahle gear reduction starter from AC Engineering of this parish. It will transform your tractor and you will be happy every time you turn the key.

@ACEngineering

Thanks BUT as much as i would like to sell him one he needs to sort the wiring problem first