Lost my Fuel and Temp Guages at the dash in my 67 Dart

Both gauges, fuel and temp, always go out at the same time but the rest work. As I understand it, The fuel and temp gauge each have a wire so how can they both go out at exactly the same time? There must be a common intersection of some kind.

I did remove the dash screws yesterday and pulled the dash out about an inch, got scared and put it back in. I need advice on how to work on the instrument panel before I go further with that.

As Dana67Dart suggested it seems like a ground or a loose connection in the instrument panel, what connection would affect both gauges besides a ground? Understand the IVR unit could be the culprit, BTW where do you get those?

I've got an old dash that was originally in the car, are the four pins in the upper right the ones that i should be looking at?


5....Ground. This is a problem. OEM clusters were grounded (poorly) by the mounting screws, and now these are so old, that rust/ corrosion has taken it's toll. Fasten a ground to a common point on the cluster, and bolt it to the dash frame or cluster support.

Dana67Dart - Can the ground wire go anywhere on the back of the dash?

PXL_20231224_165905066.jpg