This　article　discusses　the　mechanisms　enabling　spatial　resolution　in　fault　location　methods　based　on　full　transient　signals,　as　opposed　to　those　only　using　their　early-time　portion.　This　idea　is　found　in　recent　travelling-wave　methods　(TWM)　and　those　based　on　electromagnetic　time　reversal　(EMTR).　Their　spatial　resolution　is　discussed　in　terms　of　the　sensitivity　of　a　system　resonances　to　change　in　the　fault　position　and　their　coherence　bandwidth.　It　is　proven　that　using　the　entire　transient　signal　it　is　possible　to　bypass　the　Fourier　transform　uncertainty　principle,　which　limits　the　spatial　resolution　of　time-domain　reflectometry　and　standard　early-time　TWM.　Super-resolved　fault　location　is　shown　to　be　possible　only　for　resonating　systems,　enabling　high　spatial　resolution　without　relying　on　wide-band　data.　A　detailed　theoretical　analysis　for　laterals　and　numerical　results　for　networks　and　a　three-phase　line　show　that　significant　differences　can　be　observed　for　the　spatial　resolution　associated　to　each　resonance,　most　often　resulting　in　a　loss　of　spatial　resolution.　The　interaction　between　separate　resonant　structures,　such　as　laterals　in　networks　and　coupled　conductors　in　three-phase　lines　are　shown　to　be　the　main　cause　of　resolution　loss.