my mate sed he wud fix my cd player for me as it kept on cutting out but infact hes made it worse. he did fix it at one point and got it working to its full potential but when you touched the horn the fuse would blow on the interior electronics and now ive asked him to put it back how it was and the fuel gage isnt working now neither is the oil temp gage. can i fic it meself or is it a garage jobbie.