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The front and rear screen washers share the same pump - so try the rear washers and see if the sound is the same. As the headlamp washer pump is on a separate circuit there should be a distinct difference is sound.
Din't quote me and I ain't sure but I believe there may be a fuse box with relays located behind the glove-box.
Currently in madnoel10's garage:
Honda Civic 1.4l