pressure switch and relay

what are the advantages/disadvantages for running a relay for your pressure switch.i have a 98 accord and had airride for less than a year and i'm on my third pressure switch.no relay.why does this keep happening?do i really need a relay

because your pressure switch is not able to handle that kind of current draw.

yes what nick said. The contacts in the pressure switch are very small. When people used to run the little thomas compressors it was ok, but now you need to use the pressure switch as a switch to turn the relay on. The relay is a high current switch, rated at 30 amps continuous.

Use your pressure switch to switch ground to trigger a relay. It will last longer that way.

thanks.should've put it in when we installed the airride.

what's the best way to splice the relay into my wiring?where is the best place to put it?wish i would've put it in when we installed the airride.

sorry for the horrible drawing but this should get you started

thanks nick.could you make the drawing a little bigger,but it definitely helps me out alot.

http://www.suicidedoors.com/how_to/wire-diagrams/compressor.gif