New member with old gauge problem

The only real difference in the ralleye setup is that the VR is inside the fuel gauge. Other testing methods apply. You don't HAVE to buy a complete gauge just for the VR, unless of course the gauge is fried

This is as good as any:

RTE Limiter Faq - rte

mopar instrument limiter repair - Google Search

However I don't know why one would go clear one way and another gauge the other way, unless you have multiple problems. There's been a LOT of discussion about testing with resistors.........subbing for the sender:

Hey Del, Look what I found!!! An original Miller Gauge tester!!!

Once you get an IVR rigged up, you can easily test all gauges on the bench with substitute resistors, and a 12V power supply or battery