probably the dalership....or at sears or lowes
You can find an electrical schematic for a 1994 Ford New Holland 545 tractor in the owner's manual. You can also contact the manufacturer.
Go to tewarehouse.com, then OEM parts lookup, pick your brand, your model, then rider or tractor, then find/click "electrical", and a schematic should be in that section. Just keep clicking and looking.
if it has a Briggs engine go to briggsandstratton.com [all one word]
where can i find a schematic for a 700 polaris atv
You can go to your local dealer, they will print out the schematic for you.
eBay and Craigslist
Haynes
You can find a wiring schematic for an 88 Craftsman GT ride on lawn mower at various tractor supply stores. You can also find it in the mower's owner's manual.
Auto repair manual for your car with electrical diagrams in it available at most auto parts outlets.
Your best bet would be to buy a Chilton's repair Manual.
In a motor manual.
i think the catalog is called "HAYNES"