Blowing fuse turning key
 

I have a LT1050 and while cutting(literally the last row) it died. I saw the fuse blew and every time I put a new one in, it blows as soon as I turn the key. I have checked all connectors visually and seem ok. I have checked the ground and looks to be ok. Any suggestions would be greatly appreciated! I’m not great with diagnosing shorts with meter. I Have taken the deck off unplugged the PTO, and any other plugs individually and it still blows instantly! New battery also.

Could be a short in the keyswitch or harness. Not knowing your particular tractor. Is the back of the keyswitch screws on wire connectors or a plug?

The key switch is plug in.

Unplug headlight circuit. Also do you have anti backfire solenoid on bottom of carb? Both energized from same circuit of kys.

Not sure about the solenoid but i will try to unplug from the headlights and try and also look on the bottom of the carb.

I'd look for rubbed wires. Solenoids and lights seldom blow fuses. It's rare.

You need to know what year tractor you have, then you can get a copy of the wiring diagram here:

https://www.cubcadetpartsnmore.com/c...ing-schematics

I worked on 1 similar to yours and found a bad headlight bulb that the filament had blown and was touching the base of the bulb making a short and blowing the fuse

I've seen that before also, and is possible. But it doesn't happen often. Definitely something to check.

Were do you find the year of the mower? Now that i think of it my headlights are burnt out so i will check that for sure tomorrow. I tried tracing the wires but didn’t see anything.

Look on the serial number tag. I doubt it's printed on it, but may be. The wiring diagrams have a harness number on them. Or at least the one I downloaded did. Maybe you can find the harness number on yours.

How about snapping a picture of the Chassis Model/Serial Tag and posting it here. We can figure it out.

:ThumbsUp:

Amazing! Never thought it would have been this but it was the headlights. Both bulbs have been burned out and I never thought anything of it since I dont need them. I removed moth bulbs and it’s running like new! Thank you everyone for responding with all great advice.

:IH Trusted Hand:
Glad ya found it.. Makes perfect sense. Besides the Pto and the starter the headlights are next in line to draw the most amperage.

I have doubts that the bulbs are the direct cause of the fuse blowing problem.
The reason being is that the headlights on your model have their own circuit out of the alternator, that is why you they only light when the engine is running. They do not interact with the other D.C. circuitry of the blown fuse in any way.
However, the contacts in the key switch turns the headlights on and off. My guess is that you could have a flaky key switch and the fused circuit was getting crossed over to the headlight circuit and the bulbs were creating a low resistance path to ground.
Since it's running now and you don't need headlights it's a moot point, but something to keep in mind should the problem reappear.
Just my :TwoCents:

What he said...