I just got my Z/28 back from having it restored and I am having trouble with the amp and temp gauges. The lights are not working on these but the bulbs are good. Also when I turn on the headlights, the temp gauge swings full right and stays there until I turn the lights off. I have tried to remove the cluster to check the wiring but I am haveing trouble and I don't want to break anything. Any help would be appreciated. Thank you.