Not sure what the voltage limiter is but has to be close judging by the length of the wire. The picture is of a spare instrument panel, I should be able to figure it out before I crawl back under the dash. Thanks
The voltage limiter is the silver module in your picture and in the one I posted.
It limits the voltage to the fuel and temp gauges to only 5 volts.
They can be problematic. Some have created their own solid state versions, others (like me) buy the ones already upgraded.