Wiring diagram for gas gauge and temperature gauge?
both those gauges are connected to the circuit board directly through there mounting stud/bolts , the regulator is built into the fuel gauge and if it is shot it probably took the temperature gauge with it ,they usually fry both the temp and oil gauges when they go , contact Ben at DemonIVR.com he removes the regulator and restores the fuel gauge on a core charge basis along with supplying a new external regulator . Of course the temp might just be disconnected at the engine or have bad sender . I know I put new circuit boards in mine before the new fuel gauge and regulator arrived for mine and I fried both my temp and oil gauges doh !