Headlight relay removal on '98 Villager?

Hello all....first time poster to this board...good useful information! Now my question....how do you remove the headlight relay from the fuse/relay box? I have narrowed down a headlight problem to the left relay (sometimes the left headlight light comes on...sometimes it dosen't...you can feel the relay pick up (both lights work) or not pick up (left light will not come on). Anybody out there ever have this headlight problem? I have tried to remove the relay and it will not unclip. I have never had a problem on any other vehicle removing a relay. Any info will be greatly appreciated. Bisley