Ok, going to bring this back up. It occurred to me that there must have been an obvious difference between the Renegade ammeter and oil gauge compared to a well optioned CJ5 with the gauges factory. My buddy has a well optioned non Renegade Mar 71 with his original dealer sheet that clearly states the options his jeep came with, gauges, T18, dash pad etc...... Here is my question to this find. Why does a heavily optioned Mar 71 CJ5 with the factory ammeter and oil pressure gauge NOT have the unicorn Renegade only 75 ohm resistor and additional wiring? Why is the 75ohm shunt so necessary for the Renegades but not on the optioned CJ5?? Or am I just an idiot and am missing something really simple??