Bought used l4310 kubota tractor. Noticed that no dash lights come on when key is on the ON position, ie oil pressure and charge indicator lights but

[9803sally]

Bought a used kubota l4310 tractor and when I turn the key to the ON position no oil pressure or charge lights come on but the glow plug light does. Then after I start it the glow plug light never goes off.
The battery charge test shows
It is not charging. I had the alternator tested and shows it’s ok. I’m getting battery voltage at the alternator, at the red wire and both small wires at the plug with the key on. I think maybe the key switch is bad because the glow plug light should not come on with the key in the On position and never shut off after starting. This tractor calls for a 4 position switch . Mine has a 3 position one. Do you think that the reason it’s not charging is because the glow plugs are drawing more power than the alternator is putting out so the battery is continuously being drained.

 

[ROUSTABOUT]

Start it. Disconnect glow plugs and find out.

 

[WranglerX]

Did you check all the fuses....

 

[Roadworthy]

You may wish to start with your ignition switch to make sure it is the correct one and the wires are in the correct locations. Are you sure you're counting positions correctly? My tractor has four positions. Of course it has an off position. Rotating the key counter clockwise against a spring engages the glow plugs. Turning clockwise it clicks into the run position and from there you go against a spring to the start position. I don't know what a three position switch would be. You do need to check whether the glow plugs are continuously activated. If so they will burn out in fairly short order.