What's the problem?
 

Hey fellow ranger-ers...........

When I turn my steering wheel completely to the left then turn it back it softens my breaks to where it almost feels like the brakes don't work at all. What could be the cause of this?

how long since you replaced the flexible rubber hose lines

you have a pin hole leak in either side rubber line

?
 

How would I find the leak? Should I just replace the whole break line?

you should replace both the driver and passenger side rubber lines as well as the rear frame to axle rubber hose as well

Yep, Replace all 3 rubber brake hoses.