Folks,

I picked up a Hadley airhorn (w/dc compressor and tank) for an underhood installation. I need to run a feed to it - - - what's the best way to do this, should I run a wire from the fuse box under the hood (which number?), or run a wire from inside the cab. I don't want it running all the time, so I don't need an always live feed.

Thanks in advance for your help and advice.

sweet post some pics when your done.

I ran a wire from battery to a relay, turn on the relay with a switch inside cab
I also put in another relay in the factory horn wire so that I could use another switch to change from stock horn or the hadley and still use the steering wheel for both