Can you bypass the tachometer in 7.5t horse lorry euro cargo 75e15 and stil?

Can you bypass the tacho in eurocargo 2004 as stopped working and is dead as personal hgv 7.5tonne horse box I don't need it unfortunately it has stopped the speedo from working Can you bypass and get speedo working again? As don't really want to pay £400 for something I will never use? But need speedo for mot?