Fuel/Water Temp Gauge Issue Found! Now what...

Also solder the pins to the copper tracings, and on the back sides of the pins where they are hollow, after 50 years this stuff tends to get loose. I cut down small brass coated brads that I got at lowes and glued them inside the pins from the side where the pins are crimped over with super glue. This helps prevent the pins from loosening and coming apart from the board. When doing this make sure theres still clearance between the heads of the brads and the metal gage housing since that metal housing is a ground point. You can file the heads of the brads flatter, or clearance the back of the cluster housing.