I have a power steering leak trying to determine if it coming from the lines or power steering unit itself? Can anyone assist me?

More than likely the pump,but wipe all fluid away from pump and line,s,run for a little,should beaable to tell which one it is,but IMO its, the pump.

Clean up existing fluid.Check to see if have fluid in reservoir. Add if needed. With truck idling, have a pretty lady turn steering wheel all way to left or right, and you look under the hood at the leak area. System is under most pressure when steering turned like this. Look for a fine stream of power steering fluid or accumulation of fluid near the wet area or hose you suspect.If see none, then probably the pump.Good luck.Can be common on any vehicle of age. Hoses can dry rot or just plain wear out. May be a hose connection as well.