TIRES AND WHEELS

Are tires in good condition? Look for bulges, slices, bare spots, worn tread.
Are tires the right size for the load? Rotate the tires (including balancing and properly inflating them.)
Clean and repack wheel bearings and replace seals.
Are the wheel lugs tight? Are they all there?

FLOOR AND BODY

Check for floor for soft spots, rotting, splintering. This includes the ramp if you have one.
Replace damaged floor boards and treat floor with a preservative.
If you are using mats, do they fit snugly? Are they worn and need replacing?
Check metal for rust.
Check fiberglass for damage.
Check the registration to be sure it's up-to-date. Make sure the license plate is positioned so there are no sharp
edges exposed.
Check and oil all hinges, dividers, doors, locks and windows.
Check all gaskets and molding to ensure good fit of windows.

BRAKES AND HITCH

Clean and oil the jack stand.
Grease the ball and the coupler.
Inspect and service the brake drums and wheels.
Check fluid levels and lines to hydraulic brakes.
Do a loaded and unloaded drive test to check for even stopping.
Inspect emergency trailer brake battery.
Check levelness of hitched trailer.

WIRING AND SUSPENSION

Do all the lights work?
Is the wiring intact, clean and secured?
Grease the springs, shackles if appropriate.
Check shock absorbers and bushings.
tighten up the axle bolts.

SAFETY EQUIPMENT

Is your first aid kit complete?
Is your truck and trailer safety kit complete?
Do you have extra halters and lead ropes?