mf3rr0 What the probs is is some harnese's do not give the right power it needs. Ive done hundereds of installes on diff cars. Some come with anouther red wire and a fuse adapter to piggy back off in the fuse box. Ive ran into the prob on a fue cars. My ex's 2003 cav dident need it.but her moms 2004...