For those of you with Gauge problems, I may have your answer. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jorgensensc · 03-12-2009, 05:52 PM

When I got the suburban, THe gauges were already in it. THe fuel gauge didn't work, and the temp gauge didn't work, even after changing the sender. I changed out the fuel float (as it was cracked). Now the fuel gauge read at about 1/4 tank full and went down according to fuel consumption. I did a search and didn't really see an answer anywhere. Then on a whim I tried something out. I pulled the resistors that are on the back of the gauges off another known good cluster. Using my multimeter I ohmed them out. The fuel gauge resistor ohmed at about 188 or so. the Temp resistor ohmed at 90. I pulled the resistors off my Suburban and the resistor on the fuel gauge was reading 88. The temp resistor would not ohm out at all, so it was bad (hence why it was pegged at Hot). So I put the 188 ohm resistor on the fuel gauge, and the 90 ohm resistor on the temp gauge, and wha-la! They both read correctly!! So if you are having issues with your temp gauge not reading correctly, or your fuel gauge not reading correctly, check the resistors, they could be backwards if they were put on wrong during installation or after cleaning. I hope this helps some!
Shawn

OARNGESI · 03-12-2009, 06:18 PM

Good to know

68gmsee · 03-12-2009, 06:53 PM

Good tip.. May save someone some money and/or aggravation.

Is that the correct ohms for these two guages 90 ohms and 188 ohms?
I guess one could look at the color coding if they're visible.

tcb-1 · 03-12-2009, 07:14 PM

this is a good post for Krue's FAQ section!!

**clay68c10** · 03-12-2009, 11:30 PM

Nice tip, a lot of folks overlook those resistors and replace the gauge.
You can also change the resistors to work with different senders or to adjust the calibration of the gauges.

gator2511 · 03-13-2009, 05:48 AM

Thats a great tip! I checked my resistor back when I was having trouble with the gas gauge but I don't remember what it read. Thanks.

Sammy · 03-13-2009, 08:43 AM

Any of our current vendors sell those new? I would be willing to buy at least two.

03-12-2009, 05:52 PM	#1
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	For those of you with Gauge problems, I may have your answer. When I got the suburban, THe gauges were already in it. THe fuel gauge didn't work, and the temp gauge didn't work, even after changing the sender. I changed out the fuel float (as it was cracked). Now the fuel gauge read at about 1/4 tank full and went down according to fuel consumption. I did a search and didn't really see an answer anywhere. Then on a whim I tried something out. I pulled the resistors that are on the back of the gauges off another known good cluster. Using my multimeter I ohmed them out. The fuel gauge resistor ohmed at about 188 or so. the Temp resistor ohmed at 90. I pulled the resistors off my Suburban and the resistor on the fuel gauge was reading 88. The temp resistor would not ohm out at all, so it was bad (hence why it was pegged at Hot). So I put the 188 ohm resistor on the fuel gauge, and the 90 ohm resistor on the temp gauge, and wha-la! They both read correctly!! So if you are having issues with your temp gauge not reading correctly, or your fuel gauge not reading correctly, check the resistors, they could be backwards if they were put on wrong during installation or after cleaning. I hope this helps some! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

03-12-2009, 06:18 PM	#2
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: For those of you with Gauge problems, I may have your answer. Good to know __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

03-12-2009, 06:53 PM	#3
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: For those of you with Gauge problems, I may have your answer. Good tip.. May save someone some money and/or aggravation. Is that the correct ohms for these two guages 90 ohms and 188 ohms? I guess one could look at the color coding if they're visible.

03-12-2009, 07:14 PM	#4
tcb-1 Nothing to see here..... Join Date: Jun 2007 Location: Shawnee, KS Posts: 4,625	Re: For those of you with Gauge problems, I may have your answer. this is a good post for Krue's FAQ section!! __________________ Doug THANK YOU to our American Soldiers & Veterans - POW MIA "You will NEVER be forgotten". The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. Thomas Jefferson

03-12-2009, 11:30 PM	#5
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,935	Re: For those of you with Gauge problems, I may have your answer. Nice tip, a lot of folks overlook those resistors and replace the gauge. You can also change the resistors to work with different senders or to adjust the calibration of the gauges. __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

03-13-2009, 05:48 AM	#6
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: For those of you with Gauge problems, I may have your answer. Thats a great tip! I checked my resistor back when I was having trouble with the gas gauge but I don't remember what it read. Thanks.

03-13-2009, 08:43 AM	#7
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: For those of you with Gauge problems, I may have your answer. Any of our current vendors sell those new? I would be willing to buy at least two. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"



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