Factory gauge help?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bigo Serge · 01-04-2012, 11:54 AM

Does anyone know what the range of a 1972 c10 temperature gauge ohm range is?? Thanks in advance.
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RustyBucket · 01-04-2012, 12:16 PM

I stole this from another site, hope it helps..

"03-09-11 07:26 AM - Post#2058429
In response to BC1972

Using a resistance/capacitance substitution box I took some readings on a good gauge at various ohm inputs. The box I have generates discreet values of resistance. ( I was attempting to mimic the sending units output).

Ohm input value/ gauge reading

47 ohms/ pegged gauge
68 ohms/ reads past half way
100 ohms/ reads 1/3 from cold mark
220 ohms/ reads cold

Any ohm input above 220 ohms reads cold.

If your sending unit resistance goes up when heated then it is the wrong one. It is easy to test by warming it up while reading the resistance.

Your sending unit should have resistance readings close to the values that I used on the R/C box."

01-04-2012, 11:54 AM	#1
Bigo Serge Registered User Join Date: Dec 2009 Location: Wichita, ks Posts: 59	Factory gauge help?? Does anyone know what the range of a 1972 c10 temperature gauge ohm range is?? Thanks in advance. Posted via Mobile Device __________________ Pick'em up, lay'em down, Oh Yeahhh

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01-04-2012, 12:16 PM	#2
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,055	Re: Factory gauge help?? I stole this from another site, hope it helps.. "03-09-11 07:26 AM - Post#2058429 In response to BC1972 Using a resistance/capacitance substitution box I took some readings on a good gauge at various ohm inputs. The box I have generates discreet values of resistance. ( I was attempting to mimic the sending units output). Ohm input value/ gauge reading 47 ohms/ pegged gauge 68 ohms/ reads past half way 100 ohms/ reads 1/3 from cold mark 220 ohms/ reads cold Any ohm input above 220 ohms reads cold. If your sending unit resistance goes up when heated then it is the wrong one. It is easy to test by warming it up while reading the resistance. Your sending unit should have resistance readings close to the values that I used on the R/C box." __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!!



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