drpdmazda

ok heres the situation, i got an sr5 gauge cluster and sending unit at the local junkyard, installed the sending unit and plugged it up, no problem. took out the old cluster cleaned up the new one and plugged it in, ok this seemed WAY too easy and was going to smooth. turn on the truck to check that the gauges work, heres where the problems start. the tach doesnt move at all the oil pressure gauge doesnt move at all, the temp gauge instantly goes to overheated and the fuel guage goes above full, and my tank is almost empty. can anyone help me trouble shoot the problems i am having, i did a search on here and didnt really come up with anything, i am assuming that the tach wire may have to be run directly into the dash which wont be a real big problem once i figure out which wire it is and where it goes, but any ideas on the other gauges? is this cluster pretty much shot?

any help would be appreciated

thanks

jason