I had a problem with my lights, my rear ones and side lights wasn't working after my mate wired up my sub n amp, didn't realise back lights wasnt working and got pulled by cops who luckily let me off, when i got in i took the centre ot the dash out because i had no radio keys and he had wired the lights to the earth of the headunit, so i just rewired the headunit to the bottom of the dash and covered the end of the light cable and they work perfectly now, when i took it to a garage they said that its a pretty common fault for micras lights etc to stop working as the wires are at the top of the boot and tend to snap easily