65 Dart Instrument Voltage Regulator Tips

We used to have a great guy on here "Redfish," who knew more about clusters than anyone I know. Another guy on here with GREAT BIG RED PRINT ran him off

This RTE website is the only decent how to I know of. Yes, the limiter on those girls is INSIDE the fuel gauge

You will have to paw around this site a bit

https://www.rt-eng.com/index.php/RTE_Limiter2_Faq.html
Basically, for reasons that escape me, the early girls and the Rallye clusters have the limiter INSIDE the fuel gauge.

HOW IT WORKS. All gauges have basically the same electrical specs. that is, you "could" swap the temp and oil gauge wires at the engine, and the oil gauge would now read as temp, and the temp gauge would now read as an oil gauge.

The limiter on all these girls WAS a deal similar to a signal flasher, which interrupts the 12V to pulse it in approximately 50% duty cycle, reducing the effective voltage by about half

In the girls with an INTERNAL limiter, the fuel gauge has THREE terminals. One is switched 12V from the ignition switch, which feeds power ONLY into the limiter. The limiter output is INTERNALLY connected to the fuel gauge AND branches off to a post on the rear of the gauge---so as to jumper power to the remaining gauges. The third post on the fuel gauge is of course the sender wire
YOU MUST (carefully and delicately) bend or block or otherwise remove the limiter contacts so that it can not function. Some advocate separating the contacts carefully, and putting a small glob of RTV or "Goop" (that IS the brand!!) to hold the limiter arm away from the contact.

Then, as shown on the RTE site, you must externally mount the new limiter and connect it's output to the post on the gauge which branches to the remaining gauges.