hi all i no its been asked so many time but i still dont get it..
tryed fitting a jvc head unit in 2 my j plate nova...but every time i wire it up it blows the fuse wot wires do wot ??

yellow ?
red??
1 with the stripe??
and a bigger wire (fatter than the rest)??

please wot do they do..iv got a jvc wireing harness are jvc wires a straight swap with the original vauxhall 1's??? plz help me