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3/31/14 4:24pm - Original Message: 'So without loooking dumb'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600

I know its hard for me not to, but......

When testing ohms on a temp sending unit where do I put the probes of my tester? I looked on the Youtube and all them folks have multiple wires coming out of their senders, my C3 only has one tab.  I tried putting the red probe on the tab and black to a ground but got no reading (with the car running).
 
someone please splain this to me....go slow so I can take notes.
 
Rook
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3/31/14 8:00pm - Reply: 'Re: So without loooking dumb'
rraider1
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Woodland, WA - USA

Vette(s):
1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
Posts: 1152
you would measure from the center post to the base that screws into thew block or any other good ground

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Bob R
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3/31/14 8:22pm - Reply: 'Re: So without loooking dumb'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
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Yup....red lead to the terminal of the sensor, and black lead to good ground. Depending on WHICH sensor you are testing, you may/may NOT get a reading. The sensor for the temp gauge SHOULD have a resistance at any given temp. If you have electric fans, the sensor will prolly NOT register until it gets to the set temp for the fan to come on...basically an on/off sensor. On the older cars, the sensor in the pass side head(two terminals) was an on/off sensor.
If you are testing the sensor in the driver side head, you SHOULD always get a reading with an ohm meter, but it will change as the temp changes.

hth

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Joel Adams
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3/31/14 11:07pm - Reply: 'Re: So without loooking dumb'
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

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Ya, what that "Southern Boy" says!!!!

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4/1/14 4:19pm - Reply: 'Re: So without loooking dumb'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
So what setting should I have my tester on? And then if it is a bad sensor why now, right after I changed the circuit board. My temp gauge always worked fine. So I thought.

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4/1/14 10:06pm - Reply: 'Re: So without loooking dumb'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19459
Multimeter on "Ohms". Doesn't really matter what range...all you are looking for at this point is a change in the reading as the engine temp changes. If your meter shows "E" all the time, even with the engine hot, the sensor is no good. Just be sure you are making good contact with both the sensor terminal, and a good ground. Thumbs Up

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Joel Adams
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             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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