IVR/Instrument Cluster Voltage Limiter on a 65 Dart

The limiter is working. Senders and gauges operate on a 80 to 10 ohms range. A zero resistance short to ground is what sends a needle to max and will fry that gauge eventually. Disconnect the temp sender. switch on, if the temp needle moves at all you have a short to ground somewhere.
I suppose the fault could be the temp sender but most times they fail to open not closed. You could check it with ohms meter.

Hi Redfish. Thanks for the information. Much appreciated in offering your time and expertise. I will let you, and this thread, in how it goes. Best to you. sgrip65