RV Repair: Water leak under shower, 5th wheel, gray water

Question
We have a 2002 Franklin 406RK Ranchwagon 5th wheel and have a leak somewhere under shower.  Looking for easiest way to get to plumbing.  Have not found any access from inside trailer.  It only seems to be with gray water drain, shower and washing machine.  We have owners manual from Franklin and it is useless.

Answer
Hi Dave, Yea the owners rarely never give any advise on repairing the coach. On a 5th wheel, there is usually access to pluming for the shower inside the belly compartment. If not. you will have to make an opening. Its the only way to find the pesky leak. Good Luck.