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Outside Temp Display In Cab

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Apr 16, 2006
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Cardiff BTS & Tahoe
I would like to add a small LCD temp display. I picked up a cheap time/temp display from Pepboys but the lead for the thermocouple is too short to route to the front of the engine compartment. Anyone found a decent unit for the job. Picts would be nice.
 

1973Guppie

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I suspect I have the same one as you from pep boys, I just extended the wire with standard similar guage wire I had lying around and it works great.

Noah
 
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I tried extenting the wire and it stopped working. I then re-soldered the original cable without the extension and it works fine. Not sure what's going on? Is the thermocouple dependant on cable length? Maybe I will try again with a different cable.
 

1973Guppie

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shouldn't be dependent on cable length, it is just reading a slight voltage that the thermo is putting out, try to use similar wire and make sure there is a good connection.

Noah
 

e9999

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I tried extenting the wire and it stopped working. I then re-soldered the original cable without the extension and it works fine. Not sure what's going on? Is the thermocouple dependant on cable length? Maybe I will try again with a different cable.

may not be a TC. May be an RTD, thermistor, or similar sensor which is based on resistance not thermoelectric voltage, so an extension would mess things up. Or if it is a TC you may have to worry about the material of the extension, although the emfs at the new junctions should cancel out in principle IIRC if the temps are not too different.

and, yes, I think this mod was discussed very recently in another thread.
 

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