If the voltage is less than Battery voltage, check resistance from the connector to the. Using a Digital Volt Ohmmeter (DVOM), measure the voltage from the connector to ground, normal value is Battery Voltage (about 12.4V). I did not look up where it might have been if your car has the 4 cylinder Pontiac engine in it. Disconnect the engine coolant temperature gauge sensor located on the left side of the engine above the starter. The temperature gauge sending unit would have been located on the drivers side back of the top of the cylinder head unless the car had been re-engine with an earlier engine, one dating from the about the middle 70's which in that case the sending unit would be in the front center of the cylinder head just under something which as I write this hits a senior moment in memory as to what it is. The electrical information is well documented making is some what obvious how AMC did things as they apparently not only purchased a lot of their electrical items from GM but cribbed their manual too in how it is supposed to operate. One of the handier manuals I have is for a 1974 Cadillac. To the point I have lost count of them.įactory Service documentation has a wealth of information included in them so it is difficult for me to understand why when someone sinks a ton of money into actually owning a vintage car why some chump change is not put aside for something that says how it works. I also own a combination of MOTORS and CHILTON manuals that cover a range of cars from 1935 to the early 1990's which does not include the specialty manuals that I have picked up over the years. These readings are from a 1980 AMC TSM, one of 5 AMC service manuals I own and one of 8 or so factory manuals I own. The following is the sending unit resistance value when the gauge displays: I am not so sure what to do next, any help will be greatly appreciated! The current issue is the temp gauge I've located the temperature sending unit and found its resistance to be over 2200 ohms when cold, much higher than expected. It is responsible for measuring the temperature of the engine coolant and transmitting that data to the engine control module (ECM). The coolant temperature sensor is an important component in the engine’s cooling system. Hello fellow amc drivers, I have a 1981 amc eagle sx/4 and am am trying to fix some issues with the cluster. By Liam Plunket 18 June 2023 18 June 2023.
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