I'm having to refill my PS resevoir every few days. Can't seem to find the leak because the underside of my truck is just a mess. I do notice that it is dripping onto my exhaust pipe on the passenger side but see both PS ines heading towards the drivers side from the resevoir??

 

How about the connections heading TO the reservoir?

Can also check behind and underneath the PS pump housing.

Motion of the vehicle, aside from gravity can mislead the origin of the leak.

Clean off the old grime and then recheck. Can even add dye to the atf fluid to help see with colored glasses and special lighting.