PO worked on the cluster prior to me buying the truck and he believed grounds were the issue. So I went and cleaned all the grounds I could find. I have good resistance at the cluster ground to the e brake. I have power to the cluster after testing the white plug (pink is hot). Fuses are good. Volt, Oil, coolant non-op, oil works sometimes (doesn't appear to be functioning correctly). I test the metal tabs on the back of the cluster, no resistance. Found something unplugged. Whats my next step?