Where is this connector

Electrical & Ignition

  1. Kiku

    Kiku New Member

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    Just bought my 68 New Yorker a couple of months ago and im just going Thure everything so that the car will be good to go for next summer.
    Found this connector taped up next to the alternator.
    The wires are violet and gray with a black stripe.
    I am guessing its for the engine temperature sensor but would like to confirm.
    The car has an aftermarket temp gauge installed.

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  2. HWYCRZR

    HWYCRZR Senior Member FCBO Gold Member

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    Temp sensor is one wire in ‘68. Was this an original A/C car? For the compressor?
     
  3. Kiku

    Kiku New Member

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    Yes its an original AC car.
    Used one of the wires to supply the electric choke for the carb for testing the function of the carb.
    When i hooked up the cable to the carb the cold light on the dash came on
     
  4. swisherred

    swisherred Senior Member

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    it looks like the temp sensor on my 67...mine is two wire
     
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  5. HWYCRZR

    HWYCRZR Senior Member FCBO Gold Member

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    I have a gauge on My ‘68 Polara so the sender only has one wire. With just the light you may well have 2 wires. Coincidentally my one wire is Violet.

    The wiring diagram in the service manual is a good source of information as well.

    Unfortunately the ‘68 Chrysler manual is not available for a free download.
    MyMopar - Mopar Forums & Information - Service Manuals
    If you plan on keeping or working on this car a service manual is a must and a tremendous help. It will also help validate some responses you may get from this forum.
     
    Last edited: Nov 30, 2019
  6. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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    Definitely for the temp sensor.

    If your car has a gauge, there's just one wire. If the car has "idiot" lights (hot and cold), it's two wires. Since this car is a '68 Chrysler, it has the lights.

    The sensor should be on the water pump housing, near the heater hoses with the two connections sticking straight up. Often, guys will install an aftermarket temp gauge in its location instead.

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  7. 300rag

    300rag Waiting out the storm FCBO Gold Member

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    That looks to be the temp sending unit. One wire for the "hot" light, the other for the "cold" light.

    *edit - Appears @Big_John beat me to it.
     
  8. jct

    jct Senior Member

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    Temp sensor
     
  9. CBODY67

    CBODY67 Senior Member

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    Terminology - - - Sensor varies voltage to the gauge.. Sender is either "on" or "off", as for the COLD and HOT lights on the non-gauge Chryslers of '65-'68. One wire is for the cold light, the other for the hot light.

    THE wiring diagram in the appropriate FSM would confirm the wiring color codes.

    Just some thoughts,
    CBODY67
     
  10. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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    Yes and no. The terms are kind of interchangeable. Both sense change in temperature. If you really wanted to be specific, the gauge measures change in resistance of the sender/sensor by measuring current. It measures this by measuring the voltage (5 volts) drop after it passes through the sensor/sender. Saying it varies the voltage isn't quite correct. It varies the resistance.

     
  11. Trace 300 Hurst

    Trace 300 Hurst Professional Tinkerer FCBO Gold Member

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    Just a bit of info on that two-prong sender. I tested a brand new unit by heating it in in a pan of slowly warming water (with an ohmmeter connected) and the "cold" setting (when the cold light goes off) is 110-115*F. When the water was at full boil, the "hot" setting was not reached, and I'm at sea level so the boiling was at 212*. So I surmise the temp where the "hot" comes on is 220+. Just a guess.
     
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  12. cbarge

    cbarge World Famous Barge in a Budget FCBO Gold Member

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    For your 68 that is for the two prong temp sensor for the "cold" green idiot light and the "hot" idiot light.
    Hope this helps.
     
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  13. CBODY67

    CBODY67 Senior Member

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    I suspect that the in-dash factory temp gauges had about 100 degrees F for the bottom of their "band". When needle movement might indicate you could get some heat from the heater core. I suspect the upper end of the band might be 260 degrees F as that would be about the boiling point of the pressurized cooling system (15lbs)? With the center being about 210 degrees F.

    Still, though, the "sensor" would send a variable signal to the gauge to move the indicator needle across the gauge. "Sender" would either be "off" or "on" in what it sent to the indicator light(s). Both might be termed "sending unit", but then you'd need to inquire about what indicator device they were attached to, when seeking replacements.

    Enjoy!
    CBODY67