I re-wired my ammeter so that it works but still have an issue with my fuel, temp, and oil pressure gauges. They will read correctly, then high, then low and finally not or any combination. So far I have replaced the cluster voltage regulator, ignition switch, checked the cluster film for breaks and cleaned the main plug contacts. I noticed that there is a ground wire coming from the cluster plug in the wiring diagrams and a red/lt grn with a resistance wire going to the ig. switch. Do any of you know where the ground wire terminates or is the problem likely in the resistance wire?