relay fault ?

stuck in traffic a couple of days ago, got it back etc and tried to find the fault. noticed i couldnt hear the fuel pump priming so i check the fuse, which was corroded so i replaced it…. still no joy
so i thought perhaps it was the fuse board corroded as well so stripped down the dash and changed the f/box…..still no joy
tried another relay ( but cant vouch for its state ) ……….still no joy
tried the bypass with the relay off and pump primes

is this a relay fault ? will changing relay for new one fix fault as it seems strange that the fuse corroded and the relay went at the same time, and other relay didnt work ( the car it came off was a bit finnicky with the fuel pump coming on anyway.  have noticed wire for dashlights has melted ( a while ago )

any ideas people  :dontknow: