Randalla Posted June 1, 2023 Report Share Posted June 1, 2023 Recently I lost the fuel and temperature readings on my 1972 240Z simultaneously and am wondering if there is a connection. I know on Roadsters there is a step-down voltage regulator that controls both functions, but I'm not sure if there is any relationship between the two on an early Z. Checked the connections at the fuel tank and the temperature sensor and they seem secure. Thoughts? Quote Link to comment
datzenmike Posted June 1, 2023 Report Share Posted June 1, 2023 The voltage regulator powers both gauges so likely that's the problem. Find the temp gauge sender and ground the wire to it. The temp gauge should go full HOT. If no reading then probably the regulator. No idea where the regulator is on the dash. Most likely close to both gauges. The 521 truck looks like this but may not be exactly the same... Good luck finding another. You can probably pries it open and gently sand the contacts inside. Or... Quote Link to comment
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