Hey guys I've got a 05 4dr AT and as some of you may know the stock cluster does not come with a tach so I got one with a tach from an 03 2dr MT thing is I just installed it but the cluster is non responsive plugged my old one back in and it works is there anything I might be able to do to fix it? I got it off EBay and the seller said it was tested and working before shipping it to me so I'm just at a lost as to what the problem could be. Any help or suggestions is welcomed thanks.