fiesta 1.3 sidelights & dash lights?

just changed headunit in fiesta, cudnt get clip so snipped wires n reconnected with bullets, wiring was all fine and randomly later tht nite dashboard lights stayed off. after checking the fuse for left side gone, no front or rear sidelights, n will blow fuse each time its changed, any ideas where i shud start? everything was working fine till car switched off n on few times.