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Outside temperature sensor
My dash display for the outside ambient temperature did not work.
I found a 2-conductor wire lodged between the front bumper and the bottom of the radiator, which looked like it had been chopped off. There was no sensor that I could find anywhere. I suspected the wire was originally connected to a sensor, but I couldn't find one anywhere close by. I looked in my service manual but it really didn't cover this topic very well. I searched on this forum and found references to a Honeywell Fenwal thermistor that was a good replacement for the sensor, so I thought I would try buying one and try connecting it to the two conductor wire. I purchased two of the thermistors at www.alliedelec.com (about $7 each), although of course I only needed one. The part number is 192-302LET-A01. I received it and tonight I simply connected it with tiny wire nuts and electrical tape. It worked! I proved out the now working display with a thermometer outside the car and only 1 degree difference. At this stage I have just taped it to the bumper until I work out a better fixing method. Just an FYI that this works well if you have a similar issue or want a $7 fix rather than buying the ~$70 replacement sensor and cable.
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Simon Shearer 1986 420SEL 2000 Porsche 911 Millenium Edition Carrera 4 2010 Lexus RX 350 2002 Kia Rio 2002 Hyundai Accent |
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Cool. Though now that you have proved that it works, you need to solder it in and protect the joints.
I have a similar problem with my 190E, foolish me noticed that it was loose but I didn't fix it promptly. A couple of days later I noticed that -36 degrees wasn't as cold as I thought it would be. Just this past week, I found the page in the W126 service manual that lists the reference resistance at three different temperatures and was going to see if there was a thermistor to match. You just saved me the work. Thx -CTH |
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