I think that's a silly and pedantic point to make, and I never described the volt meter specifically as Renix. To me a "Renix-ism" as an odd characteristic of a Renix era truck.
I'll have to poke through the FSM to see how the 89 wiring does it and do something similar when I decide to fix it. I'd much rather do that than run a new power wire to the gauges from the battery. If I come up with something I'll report back.
Did you view this link?
http://www.jeepforum...uge-fix-684375/