Den,

This can get complicated. If you want the alarm to run key on to key off then use connector X22, use wire 95B as the positive and wire 13 as the negative. If you want the alarm to activate for reverse or forward only, a module needs to be installed. This will require a certified tech to install as wire combinations become difficult. Depending on who buys the truck, the alarm can be mounted on the side of the mast, inside a plastic guard or on top of the OHG. Good Luck.