You could simply wire it through a fuse holder off the battery easy enough. I think too that there is switched connector under the dash to your left. Solid enough for your pump?

IMHO, the 12V "inflators" are a joke. Buy a decent "manual" pump, not a little bicycle pump, but something you could pump up a car tire with. LT/GT tires only need at most 12-14 PSI. I have one I picked up at WalMart years ago for under $10. If a tire looks soft, grab that rather than turning on the compressor, airing up the tire, then bleeding it back down, then blowing out the air tank. Here's an example from Amazon.

http://www.amazon.com/Custom-Accessories-57773-Deluxe-Hand/dp/B0000CBIK5/ref=sr_1_fkmr1_2?ie=UTF8&qid=1448031026&sr=8-2-fkmr1&keywords=anual+tire+pump

Assuming you'll get the inflator, make sure the engine is running before you turn on the pump, those can pull a battery down fast.

Good luck,

OP: I have an air pump that I use for the tractor and car tires . For the tractor it can inflate the tires in about two minutes, much less when adjusting the tire pressure before mowing.

Even with the Van which requires 38 psi in 16" tires, I can use it to adjust the pressure. At this high pressure I have to have the pump running before connecting to the tire, but it can increase the pressure from about 30 psi to 38 psi in about a 1 minute.

I have had the pump for about 10 years now. I got it at Harbor Freight. and believe I paid about $17 on special. I believe the link is the same pump I use.

http://www.harborfreight.com/12v-100-psi-high-volume-air-compressor-69284.html

I would highly recommend it for anyone wanting a pump for most of the around the house uses and as an emergency pump to carry in the car. (The car is where mine resides most of the time.)

I have a 60 gal 220/5HP 14CFM unit - I hate waiting:)

I have had a big compressor in my garage since 1967 and can't live without it.

OP can that be run from my lawn tractor battery?