The Dispatch | Expert | Scudo Hub

Good Evening fellow Jumpy owners.  I wonder if anyone can point me in the direction of a potentially faulty relay.  I have a 2013 1.6HDI Dispatch with a really annoying problem.  My headlights work fine until I put them on high-beam.  As soon as I pull the stalk, both headlights go out but side lights stay on.  I have checked the bulbs and fuses, no problems there.  I have taken the stalk assembly off, taken it apart and cleaned all connections but it did not make a difference.  Everything else works on the stalks so I wondered if there is a relay in need of replacement.  The issue is, I cannot find any relays, anywhere.  I have located a fuse box behind the drivers side plastics, below the cup holder and the fuse box under the bonnet.  Does anyone know if a panel of relays exists or can suggest the cause of my problem?  As a last resort I will have to buy a new stalk assembly but as they are not cheap, I wanted to make sure I have covered all possible potential issues.  Thanks in advance.