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1978 c10 350So my temp gauge has never worked since buying this truck. The gauge always reads full hot, even when the key is in full off position.Its my understanding that a grounded wire would make it read hot, but with the key off this shouldnt be the problem right?Side question, where is the sending unit? I see a sensor towards the back of the passenger side of the engine. Is this the oil or the temp sending unit? Its not hooked up either.
I have a similar issue to this, mine is always stuck in the middle regardless of hot or cold.
Quote from: teamcurtis on January 25, 2017, 11:50:42 AM1978 c10 350So my temp gauge has never worked since buying this truck. The gauge always reads full hot, even when the key is in full off position.Its my understanding that a grounded wire would make it read hot, but with the key off this shouldnt be the problem right?Side question, where is the sending unit? I see a sensor towards the back of the passenger side of the engine. Is this the oil or the temp sending unit? Its not hooked up either.The temperature gauge registering full hot implies the gauge isn't connected to its sender. The gauge needle may "rest" in the full hot position even with the ignition off since there is no spring to return the needle to cold when not powered.Exactly where is the sensor you found towards the rear passenger side of the engine... on the exhaust side of the cylinder head?? As Captkaos stated, the factory location for the engine temp sensor is in the side of the cylinder head between #1 and #3 cylinder exhaust ports.Quote from: MrFiveOh on January 25, 2017, 01:05:07 PMI have a similar issue to this, mine is always stuck in the middle regardless of hot or cold. Check power and ground to the gauge.
Thanks man, it will move toward hot when driving, but regardless it never goes down to cold when it is cold.
Sounds like i need to pull the gauge regardless
Quote from: MrFiveOh on January 25, 2017, 02:08:59 PMThanks man, it will move toward hot when driving, but regardless it never goes down to cold when it is cold. Temporarily ground the temp sensor lead to see if the gauge drops to cold.I grounded it on multiple locations and the gauge didnt budge. Im guess i have a bad gauge. Temp unit is new.