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I have just replaced the dash harness and trying to get all the gauges to work, which were not working previously. I have located the temp sending unit however, there are no wires connected to it. Can someone tell me or send a picture of which wires I should be looking? This is a 1975 corvette.
Also, for the battery gauge should this read 0? I was expected it to read 13.
Thanks for the quick reply. I am good on the instrument cluster side. My issue is the engine side.
Would you have details or a picture of where the sending unit connection wire is coming from? I see my sending unit, but don't see any extra wires hanging around to attach to it.
Temp sending unit is on left head, near the front..
There should be a single wire blade-type connector that comes out of the alternator harness and drops down to the sending unit.
The battery gauge is normal at 0, slightly above when engine/alternator/battery are good.
My 350 has the sending unit on the drivers side between 1 and 3 spark plug. It's a single post coming out of the sensor, and the wire has a female fitting that goes over the post. The wire then marries up to the alternator bundle and then runs up the left fender (my routing may not be stock).
The "battery gauge" as you call it, was an Ammeter as-built. Should read in the middle zero range when running normal.
If someone has switched that out for a Volt-meter, then it should sit around 13 or 14 V when running. (If you're seeing a 13 on your gauge, then you've probably got a Volt-meter.
Water temp sending unit wires
