Quote:
Originally Posted by Jeremy5848
Nice schematic. The relay really isn't necessary; you can use an SPDT switch to change from one sensor to the other, or a rotary switch to change between multiple sensors. The sensor is just a thermistor (a resistor genetically engineered to have a lot of sensitivity to changing temperatures). You will want to test the sensors at various temperatures to make sure they read the same or at least determine the error from one to another, shouldn't be much more than a degree or two. Others have stuffed the 124 readout into a 123 instrument cluster, using the spot originally designed for a "PRND2L" column shift display. If it doesn't fit, I have a 126 display that might work.
Jeremy
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Thanks Jeremy!
SPDT switch? will an MB antenna up and down switch work?
The reason I originally want to put the 2 sensors on a relay and use a rear dome light switch is I want to use MB switches that I can put to replace the speaker fader wheel at the center console.
I did a little research the the shorter W124 display fit's better than the w126's.
I knew an expert will chime in and I'm glad I posted this question. Thanks for pointing out that a relay is not necessary!