My husband and I bought a 10 year old home a few years back. It has large PVC pipe coming out of a retaining wall flowing to the street, however, I have never seen any water come out of them. I have tried putting the hose down the few french drains that I can find - but they just over flow. Any advice of how to track them - and how to clean them out.

Thank you in advance for any advice you can offer.