Scotts l2548
New key swtich, new soloid
Tractor won't turn over to start

Hi,
That would leave the seat, brake and blade switches in the path to the solenoid from the switch. I check these by taking a wire and jumping from the battery post of the solenoid to the trigger post of the solenoid. Battery post is the large one with the wire from the battery and the trigger is the small one, usually with a red or orange wire to it. If the solenoid triggers, then it is a switch. The brake switch gave the most trouble and is on the frame on the left beneath the dash/operator pedestal. This all assumes a good battery with good clean cables.
Peace,
Clarke
PS If this is a Deere Scoots, then I can email you the owners manual(too large to post here.)