Edited: 1/5/2009 9:06:06 PM by loudciv
if you want your truck to dump when the alarm goes off. some switchboxs come w/ an alarm input hook up. if you want to be able to dump / lift your truck w/ your alarm remote you'd have to run the alarm output trigger wire to a relay, then out of the relay output you have to use diodes to let the output voltage to go in 1 direction, but not screw up normal valve operation. this pic is talking about door triggers, but its basically the same thing. just replace the door triggers w/ a dump valve wire.
http://www.the12volt.com/12voltimages/posdoortrigs.gif if you want the truck to drop when the alarm goes off, you'd do the same as above but use a different output off the alarm.