4010 diesel electrical system

I bought a 4010 that will run when pull started, but will not run by starting with the starter. I just had it rebuilt, the batteries and cables are less than 1 yeaar old. I"d like to find a schematic from all of the wires that leave the ignition switch and go to the solenoid and elsewhere. Would anyone have a diagram of this they could send me? It would be greatly appreciated. What is a good way to tell if the switch is working, it seems there are alot of wires coming off of it and I dont know where they come/go from. I tried to bypass the safety start switch (park) and that made no difference so I can assume it"s working. Also, the system is still 24 volt.

Thanks

If sitting on the tractor, the left battery measured 12 volts, while the right battery measured 6 volts.

The left battery is grounded on the positive post, while the negative terminal goes to the lower side post on the starter.

The right battery is grounded on the negative post, while the positive terminal is hooked to the top post on the starter solenoid.

The batteries are not connected to each other. Do they connect to one another through the starter? Is this way just a better way of hooking batteries in series or is the system hooked up totally wrong? I"m still unsure on the different voltage"s of the batteries. It appears it is 18 volts rather than 24 volts with 1 6 volt and 1 12 volt in series. I guess I just need some more insight. It may not be the switch wiring at all, just the way the batteries are connected.

Thanks

I performed the test you described and you were correct. The left battery shows full voltage with no current draw on the cable going to the starter. However, the right battery is showing about 6 volts and when checking for current draw on the cable going to the starter, I have about 3.5 mA.

What is my next step?

Thanks

Thanks

The voltage at the large stud on the starter solenoid should be -12 Volts, and the voltage at the starter stud on the backside (towards the engine block) terminal will be +12 Volts, with the voltage measured between the two at 24 Volts.

I didn"t get any voltage readings at the starter. Would this be messed up due to one battery being 6 volt and the other being 12 volt.

Thanks

BE SURE tractor is out of gear at all times, and keep the "kill" knob pulled, as you never know when something you do with the wiring may make the starter kick in.

Also, I never wear a watch (metal band) when working around these systems. That stack of batteries puts out enough current (and voltage) to weld with, and I've heard horror stories about people getting badly burned when their watch band caused a short!

I&T manuals, for $20, something have a basic wiring diagram, the genuine Deere shop manuals have a lot more detail, with wire color codes, and a better layout of the light wiring.

If it's your tractor, and you're keeping it around for a while, having the factory manuals is priceless, though they will cost a few bucks!

If you're cheap (I am), I have had good luck having the dealer's shop foreman print off a copy when I've needed diagrams. It certainly wouldn't hurt to ask.

Link

Thanks,

John