1990 Dodge Ram Clutch safety switch

My 1990 dodge ram 150 4x4 will not start when the key is turned to the "start" position, however when i turn the key to the "on" position and jump the starter terminals B+ and S the starter will turn without the clutch depressed, and when i turn the key to "start" i do not hear the relay click to engage the starter. My question is, where is the clutch safety switch located, and also where is the starter relay located.