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Old 11-30-2012, 05:30 PM   #1
brownbear95
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motorcraft dy-1145

has anyone here replaced their ect with this motorcraft part? I got mine today and it doesn't look like the others I have seen. the brass end is not in a tapered cone shape. it's brass, it doesn't have a threaded tip for a one wire plug, like for a gauge. it's brass and it's about 1/2" rod looking thing. the plug is different from the factory, it still has 2 prongs it's just different. it comes with a new pigtail plug with crimp connectors and heat shrink tubing, so it looks like you have to cut the old one off and replace it with this new plug. will it work, is it just a new design from motorcraft? i bought the part from rock auto and it shows my year and motor, 95 5.8L. the ad says temp. sender/sensor, but the bag it came in says sender. part# on the bag are dy-1145 and below it is 9U2Z-12A648-A
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Old 11-30-2012, 06:59 PM   #2
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www.fordparts.com indicates a DY681 F2AF-12A648-AA, F2AZ-12A648-A (Engine Coolant Temperature Sensor, All Engines; Ambient temperature sensor for engine control; Rounded connector with 2 round pins).

The DY1145 9U2Z-12A648-A is a Coolant Temperature Sensor Kit which is for vehicles with rectangular connectors and includes a pigtail for splicing in case you have a round connector.

Personally, I would get the correct DY681 and use your existing OEM Harness Connector.
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Old 11-30-2012, 07:17 PM   #3
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i thought i was getting the right one, it was refered to me by miek5, my question is will it still work, i dont' mind doing the kit thing, but i need to know if it will work or if i have to return it
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Old 11-30-2012, 07:32 PM   #4
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Same, same. I believe this is a Mustang part. Again, it is the incorrect part for your Bronco. And yes, I believe that you can make it work. But this may create confusion for future owners. Personally, I would return it and get the cheaper DY681.
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Old 12-01-2012, 09:30 AM   #5
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yo BB,
Did you ever test the old ECT while still in Bronco as per Fireguy's test?

btw, I did recommend DY-681 at that other Forum in reply to your Q;
"1995 Bronco 5.8 for ECT at RockAuto; the Standard units are = to Motorcraft
Standard pn is TX6
Ford Motorcraft DY681 (long Ford pn is F2AF 12A648-AA; Rock Auto & other parts places often delete the dashes and spaces and post it as; F2AF12A648AA, etc.)
1995 Ford Bronco Drive Type: 4WD
Engine Coolant Temperature Sensor
All Engines; Ambient temperature sensor for engine control; Rounded connector with 2 round pins Ford Dealer Price is $54.53

Another source is a Ford Dealer that discounts on-line;
http://www.tousleyfordparts.com/part...icleid=1106110
DY681
Part Name SENSOR ASY-ENG ELEC
MSRP $54.53
Core $0.00
Online Price $26.99

vs Ford's On-Line Catalog @ http://www.fordparts.com/


& wrote that MOTORCRAFT Part #DY1145 {DY681, F2AF12A648AA, F2AZ12A648A} Coolant Temperature Sensor; For vehicle with rectangular connector,[/b] [b]includes pigtail for splicing if vehicle has round connector


& here is the Rock Auto DY681 I was ref you to;
MOTORCRAFT Part # DY681 More Info {#F2AF12A648AA, F2AZ12A648A}
Category: Temperature Sender / Sensor (Only 5 Remaining)
$32.79
http://www.rockauto.com/dbphp/prt,48,DY681

I know this gets confusing at times, so hang in there.

I will be away from Sun late morning to WED; need some med work on eyes.
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Last edited by miesk5; 12-01-2012 at 09:31 AM. Reason: spAllAng
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Old 12-01-2012, 01:12 PM   #6
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is the motorcraft dy681 still a good number? i placed an order with the toulsley ford place and they said the part is no longer good and wanted to charge me another $8 for another part and the number he read too fast for me to follow sounded like the same part I already have. I'm going to search for another part source for the dy681
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Old 12-01-2012, 01:56 PM   #7
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ECT Testing

The ECT is a Thermistor, (or Thermal Resistor), which reduces VREF Voltage to the SIG RTN as it gets warmer. One wire is VREF and the other wire is SIG RTN (Signal Return). The ECT can be tested either by Resistance or Voltage. Failure in either the circuit or temperature sensor will show a DTC 21, 51, 61 or 116, 117, 118.


ECT Reference Voltage Testing
Start by checking the connector to ensure that the pins are making good contact.
Check the reference voltage at the unplugged connector with the key on, engine off.
Should be approximately 5.0v.


ECT Sensor Voltage Testing
Before warming the engine, test the SIG RTN Voltage by back probing the plugged in harness connector with KOEO & KOER and record the voltage.
Should be approximately 3.7v cold.
Then at normal operating temperature, back probe again.
Should be approximately .5v warm.


ECT Sensor Resistance Testing
Unplug the harness connector.
Then, check the resistance of the sensor cold. Should be between 40,500 to 58,750 ohms.
Plug in the harness connector and warm up the engine to normal operating temperature.
Then, unplug and check the resistance of the sensor hot. Should be 1,840 to 3,600 ohms.








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