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86 300E Temperature Gauge Malfunction
Hey everyone, I recently purchased a 1986 300E and there is something wrong with the temperature gauge. No matter how long the car has been on it just stays at the bottom of the scale. I took in to have it looked at and a mechanic told me that the gauge itself wasn't working properly and that it needed to be replaced. So I purchased a new instrument cluster and installed it but I'm having the same issue as before. All other gauges work except the temperature gauge. The car has enough coolant and does not overheat, the guage just doens't work. I replaced all of the fuses just as a precautionary measure but still no affect. I'm not sure what else could be wrong with it. Any help you could give me would be appreciated.
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The gauge reads the engine temp from one of the sensors at the back of the engine (I believe its the last one towards the firewall). If that isn't working properly, that could be your problem, or it could maybe be the wires that fee the gauge itself. I'm sure someone else will add to this and clarify the exact sensor on the engine and how to test if it is working.
Good luck man. |
The connection is off the sensor or the sensor is open.
http://catalog.peachparts.com/RenderScriptTemplate.epc?_cmd=epccat_VehicleAAA&cookieID=2FG17RJ3A2GE0I783D&yearid=1986%40%401986&ma keid=MB%40%40MB%40%40X&modelid=300%2DE%2D002%40%40300E&catid=P%40%40Body+Electrical&mode=PA&subcatid =P4036@@Water+Temperature+Sender&source=www.peachparts.com&clientid=catalog.mercedesshop Ground the wire and the gauge should go all the way HOT. If YES, replace sensor.. [ or ohm the sensor..should be 67 ohms @80C] |
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The sensor needing to be replaced is exactly the problem! thank you for all of your help. It's greatly appreciated :) |
Do you want to sell your old instrument cluster?
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Your Welcome........ |
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