66 Fuel Guage question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevy_mike · 08-05-2011, 11:11 PM

Actually my understanding is '66 was the first year they went to 90 ohm senders in the trucks. Prior was 30 ohm.

Now if his gauge cluster/gas gauge is from a '65 and earlier, that could account for an issue.

CaptHutch66 · 08-06-2011, 09:58 AM

Thanks for all of the responses guys! Yeah I'm not sure what year the dash is I have three from the 60-66 year models and if there was a change within the dashpanel (mech/electric) other than cosmetic it would be hard to know! I have changed the location of my power on the fuse block and now I'm getting "1/2" tank reading! I'll keep my fingers crossed that its working properly now. If it was in fact the location of the power source at the fuse block then there would have to be some sort of metering source at the fuse block that throttles the amp/ohms. My fuse block has been painted over a couple of times so its hard to tell what is what. But again I appreciate all of the responses and the willingness to lend an opinion! Best site on the net for help and info!

**TR65** · 08-06-2011, 09:43 PM

Quote:

Originally Posted by chevy_mike

Actually my understanding is '66 was the first year they went to 90 ohm senders in the trucks. Prior was 30 ohm.

Now if his gauge cluster/gas gauge is from a '65 and earlier, that could account for an issue.

I didn't know which year changed to 90 ohm. LMC and Classic Parts sell the same sender for 60-66.

Quote:

CaptHutch66
Re: 66 Fuel Guage question
Thanks for all of the responses guys! Yeah I'm not sure what year the dash is I have three from the 60-66 year models and if there was a change within the dashpanel (mech/electric) other than cosmetic it would be hard to know! I have changed the location of my power on the fuse block and now I'm getting "1/2" tank reading! I'll keep my fingers crossed that its working properly now. If it was in fact the location of the power source at the fuse block then there would have to be some sort of metering source at the fuse block that throttles the amp/ohms. My fuse block has been painted over a couple of times so its hard to tell what is what. But again I appreciate all of the responses and the willingness to lend an opinion! Best site on the net for help and info!

If I am not mistaken, the fuse block is not the power source for the fuel gage. It is just a junction point. (If I am reading the wiring diagram correctly) The power comes from the ign. switch circuit.

TR

CaptHutch66 · 08-07-2011, 08:48 AM

Mine has been painted over but heres a pic from a previous post; I assume this is the correct power source. If anyone knows different please advise.

08-05-2011, 11:11 PM	#1
chevy_mike Never Ending Projects Join Date: Jul 2006 Location: San Diego, CA Posts: 3,836	Re: 66 Fuel Guage question Actually my understanding is '66 was the first year they went to 90 ohm senders in the trucks. Prior was 30 ohm. Now if his gauge cluster/gas gauge is from a '65 and earlier, that could account for an issue. __________________ . 1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often...

08-06-2011, 09:58 AM	#2
CaptHutch66 Ooops! Wonder what that costs? Join Date: Jun 2010 Location: Sharpsburg, Ga Posts: 118	Re: 66 Fuel Guage question Thanks for all of the responses guys! Yeah I'm not sure what year the dash is I have three from the 60-66 year models and if there was a change within the dashpanel (mech/electric) other than cosmetic it would be hard to know! I have changed the location of my power on the fuse block and now I'm getting "1/2" tank reading! I'll keep my fingers crossed that its working properly now. If it was in fact the location of the power source at the fuse block then there would have to be some sort of metering source at the fuse block that throttles the amp/ohms. My fuse block has been painted over a couple of times so its hard to tell what is what. But again I appreciate all of the responses and the willingness to lend an opinion! Best site on the net for help and info! __________________ Hutch.....Metro Atl Fireman 29 years 1952 GMC 228 w/4spd Hydra Matic (SOLD) 1966 GMC stepside Shrtbed...350 w/Turbo 350 auto

08-07-2011, 08:48 AM	#4
CaptHutch66 Ooops! Wonder what that costs? Join Date: Jun 2010 Location: Sharpsburg, Ga Posts: 118	Re: 66 Fuel Guage question Mine has been painted over but heres a pic from a previous post; I assume this is the correct power source. If anyone knows different please advise. Attached Images __________________ Hutch.....Metro Atl Fireman 29 years 1952 GMC 228 w/4spd Hydra Matic (SOLD) 1966 GMC stepside Shrtbed...350 w/Turbo 350 auto



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