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  1. #1

    Join Date
    Jul 2003
    Posts
    20
    Location
    Columbus Ohio
    Tractor
    Ford 1210

    Default Testing Temp Sensor?

    Could anyone tell me how to test a temperature sensor? I have a Ford 1210 that has Oil, Temp, and Battery lights. When I turn the key right before starting the Oil and Battery light stay illuminated until the motor starts. The Temp light never comes on, but I donít know if it really should? I checked the Temp Bulb and it and the socket are good. Any idea how to test the sensor, I want to make sure I know if the tractor is overheating. Thanks

    Eric

  2. #2
    Gold Member uhmgawa's Avatar
    Join Date
    May 2003
    Posts
    282
    Location
    New Hampshire
    Tractor
    Kubota L48TLB

    Default Re: Testing Temp Sensor?

    </font><font color="blue" class="small">( Could anyone tell me how to test a temperature sensor?)</font>

    It depends whether it is a switch or resistive, but the
    process is the same assuming you can remove the sensor.

    Place an ohm meter across the sensor and put it in a
    container of cold water along with a known accurate
    thermometer. Heat the water gradually and note the
    resistance vs. water temperature or where the switch
    actuates. You can compare this to the manufacturer
    specification for the sensor.

  3. #3

    Join Date
    May 2003
    Posts
    79
    Location
    Morrison, CO
    Tractor
    JD 4310 Power Reverser

    Default Re: Testing Temp Sensor?

    Eric,

    To test the light and the wiring from the sensor to the light, remove the lead that is connected to the sensor. With the tractor running, ground this lead, either by directly touching it to a good ground, or by attaching a jumper to ground. If the light comes on, then you know that the circuit from the sensor to the light is good. If it does not come on, its time to start tracing the wire to find a bad connection, or break in the wire some where.
    This also works for guages to tell whether the guage, wiring, or the sensor is bad.
    Good luck,

    DT

  4. #4
    Super Member RickB's Avatar
    Join Date
    Sep 2000
    Posts
    7,038
    Location
    Eastern NY
    Tractor
    Case 885, JD 730D, Ford 4000

    Default Re: Testing Temp Sensor?

    There is no test mode at startup on your temp gauge.

  5. #5

    Join Date
    Jul 2003
    Posts
    20
    Location
    Columbus Ohio
    Tractor
    Ford 1210

    Default Re: Testing Temp Sensor?

    Thanks Rick,

    That makes me feel better knowing it should not light at start up.

  6. #6
    Silver Member
    Join Date
    Mar 2002
    Posts
    234
    Location
    Southern Maryland
    Tractor
    Iseki TA270F, YM1510D

    Default Re: Testing Temp Sensor?

    I have never been able to find manufacturer's specs for temperature sensors. Do you have a good source?

  7. #7
    Gold Member uhmgawa's Avatar
    Join Date
    May 2003
    Posts
    282
    Location
    New Hampshire
    Tractor
    Kubota L48TLB

    Default Re: Testing Temp Sensor?

    </font><font color="blue" class="small">( I have never been able to find manufacturer's specs for temperature sensors. Do you have a good source? )</font>

    This can be found in the service manual.

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