Has anyone ever checked a Hawk temp. gauge with a meter? If so, what should I see? I can't believe I have six gauges that are bad. I have one more coming sometime this week, but I would like to check the others before I trash them.- Jim
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If you put 12 volts to the Batt. side, you would have to apply the correct resistance to the other side with a matching (same source) ground to reach Full or Empty.
If they are OEM Original SW/Studebaker Hawk gauges keep them, there will come a day when the ONLY source is expensive rebuilding.StudeRich
Second Generation Stude Driver,
Proud '54 Starliner Owner
SDC Member Since 1967
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Mine wasn't connected properly and as a result the engine ran too hot without me realizing it. result was catastrophic engine failure followed by a long and costly engine rebuild followed by cooling system repair. Bummer? You bet!peter lee
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Remember! Hawks have a fiberglass dash. The gauges all have to be grounded. There should be a network of ground wires linking the mounting studs on each gauge box and the housing of the larger instruments.Gord Richmond, within Weasel range of the Alberta Badlands
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When I worked at the GM dealership in the 70's and 80's I kept a 0-100 ohm rheostat in my tool box to check fuel gauges.
Now I need to find out the ohmsreading for my 1950 Land Cruiser sender, because it only reads 5/8 when it's full.
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Originally posted by TWChamp View Post
Now I need to find out the ohmsreading for my 1950 Land Cruiser sender, because it only reads 5/8 when it's full.RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.
10G-C1 - 51 Champion starlight coupe
4H-K5 - 53 Commander starliner hardtop
5H-D5 - 54 Commander Conestoga wagon
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Hello Jim
I measured an old non-working temp gauge and a NOS temperature gauge with a multimeter (out of the car). The old temperature gauge had a resistance of 0 Ohm, so it was definitely defective. The NOS temperature gauge (which works perfectly) had a resistance of 240 Ohm and was alright.
I also measured the installed temperature sender, it had 0.878 Ohm and the new temperature sender I have in the package is 0.862 Ohm. Both working.
Rudysigpic
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Under 1 ohm sounds very wrong for a cold temp sending unit. Seeing as grounding the sender wire to the gauge makes it peg out to "hot". Maybe it's .862 k ohms? Those auto-ranging digital meters can trip a guy up. Also a gauge itself will have three resistance values: ign to ground, sender to ground, and ign to sender.
There is actually a network of resistors inside a gauge, but they aren't really resistors as such; they are tiny heating elements acting upon bimetal strips, which bend when heated, and move the pointer via a simple linkage.Gord Richmond, within Weasel range of the Alberta Badlands
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Originally posted by jrlemke View PostSo what are the three resistance values?-JimGord Richmond, within Weasel range of the Alberta Badlands
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