I replaced my instrument cluster a while back to fix a bad spedo problem. Every thing was great until yesterday. I got in the red lizard to go home and the tach and spedo are dead, nothing but lights, the other gauges are working just fine. Anyone have any suggestions as to where to look for the problem? Fuse? Relay? or something else?

I had this thing in the dealer shop for three days supposedly getting everything checked out and put right. I balked at their 850 dollar cluster replacement cost and got the one I have now from a buddy that was parting out a 2004 grand cherokee limited which is what I have.