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| Temp Gauge Sending Unit Issues (Page 2/3) |
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theogre
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MAR 11, 06:32 PM
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Again, ECM sensors has no connect w/ base except "1 wire" O2.
New ECM sensor you buy uses competently and can't use other plugs. Can't even use the old plug and buy a new plug.
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stark86
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MAR 12, 03:09 PM
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Took the Teflon tape off, didn't work.
The part I ordered from TFS is the 84-88 Temp Gauge Sending Unit, Part # 51404.
This is how I'm measuring the resistance. I tried with the positive probe on both pins to no avail.
Did I just get unlucky with a DOA Part or am I being stupid and doing something wrong?[This message has been edited by stark86 (edited 03-12-2023).]
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cyrus88
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MAR 12, 04:04 PM
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What is the temp of the room in which you are bench testing this new sensor?
If it is less than 90F you have to put your DMM setting greater than the 2KOhm range you have showing in the pic above (see the temperature chart in the first reply to your question).
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theogre
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MAR 12, 04:40 PM
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Like said just above... 1 pin needs next range to read Ω.
Other pin will Never get Ω because the switch is open. Only "test" here is Hot Oil heated to > 260°F. Not a good plan for many people.
Using a torch etc on the tip can heat too high or too fast and break the part.
E2A--->Think above chart is for ECM ECT sensor... While both use NTC, Gauge has different values/curve for it.[This message has been edited by theogre (edited 03-12-2023).]
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stark86
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MAR 12, 04:40 PM
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| quote | Originally posted by cyrus88:
What is the temp of the room in which you are bench testing this new sensor?
If it is less than 90F you have to put your DMM setting greater than the 2KOhm range you have showing in the pic above (see the temperature chart in the first reply to your question).
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Still getting nothing in the 20k Ohm Range. 70 degrees F in here.[This message has been edited by stark86 (edited 03-12-2023).]
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sanderson231
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MAR 12, 04:53 PM
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Check the resistance between the two pins of the sender. If there is continuity you have the wrong sensor. ------------------
formerly known as sanderson
1984 Quad 4
1886 SE 2.8L
1988 4.9L Cadillac
1988 3800 Supercharged
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stark86
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MAR 12, 05:03 PM
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| quote | Originally posted by sanderson231:
Check the resistance between the two pins of the sender. If there is continuity you have the wrong sensor.
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I'm getting nothing between the two pins.
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sanderson231
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MAR 12, 10:09 PM
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| quote | Originally posted by stark86:
I'm getting nothing between the two pins. |
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No resistance or an open circuit?[This message has been edited by sanderson231 (edited 03-12-2023).]
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stark86
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MAR 12, 10:14 PM
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| quote | Originally posted by sanderson231:
No resistance or an open circuit?
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Open circuit on both pins.
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stark86
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MAR 19, 02:00 PM
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Update: It just ended up being a faulty sensor... lucky me I guess. I followed Ogre's advice and put PTFE pipe joint compound on and it works great now. Thank you to everyone that replied
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