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:-) Hey... no need to be confused here. Let us take this step by step. When you are driving the tractor from what you says, it seems normal. You can start it, and you can drive it, as long as you are not using your lights. Right ?
This tells me the battery is fine, and it tells me the charging is fine. If the battery or the charging where bad, you would have problems starting it. Let me tell you. If your battery is almost dead, either because it is worn out and needs to be replaced, or because the generator/alternator is not chargin it the ignition and lights will work much longer than the starter will do. The starter is the one that will be dead first. I have no idea how your tractor is wired. If it is wired originally it is easier. Normally there should be a wire from the primary side of the starter switch on top of the gearbox in front of the steering box, that goes to the primary side of the ign. switch. Check for loose ends on this wire. Then, it can be a bad ignition switch that does not allow enough current to go through it. Then it can be a loose connection on the secondary side of the ign. switch. It can of course be other things, but I am pretty sure you would find the problem within this area. The reason for my conclusion is that what you say leads me to think that whenever you turn on the lights, there is an increase in the current from the battery to the lights. It has to be a higher resistance than normal somewhere in the harness that goes to both the ignition and the lights to cause the problem that you are describing. If it was a loose connection in the harness from the light fuse to the lights the lights would lit up badly, but the ign. would not suffer. Well, I guess this is enough for now. Let us hear what you find.
Best regards, Bill
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