I want to put my compressor behind the rear seat "Crew cab" and I don't want to run a power wire all that way. What do you guys think about splicing off the trailer power supply? That way the pump will only come on with the key so I don't have to run another relay. It should handle it, it does run all the lights and stuff in the trailer.....

 

I have the compressor behind my seat, which my truck is a Single Cab but it really isnt all that bad running the wire the only problem is what you mentioned it does run constantly and my tank has a leak now if i leave it pluged up it will run my battery down..

 

got a tool box? Id be mounting it in there if so

 

Not really a tool box guy, don't want a bunch of junk getting in there. And that is just what will happen......

 

if i were you i would hook it up to a toggle switch and then run it straight to the battery, that way you can choose when you need it on.
just thought i would throw that out there