The temperature gage and the oil pressure gauge in my ‘76 280Z suddenly stopped working. My first thought is a fuse has blown. However, I can’t find any mention of these gauges being fused. Any ideas?
Or a common ground possibly.They work intermittently now. I didn't do anything. Since they both go on and off together, I assume there's a single electrical connection involved.
Check the fuses at the fuse block with a test light, not an ohmmeter. Make sure that there isn't any rust on the pinch clips for them as well. Check the fusible links in front of the battery making sure that they are all clean and tight. Unplug the sending units and clean the connections thoroughly on both the sender and the wire end. Ground the wire end to the engine, turn the key on and the gauge should peg. Then do the end for the other sender. If the gauges peg then everything is good provided that your sender and the connection is good. If the gauges don't peg with the sender wire grounded then your gauge is suspect. Z man of Washington