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07-04-2017, 07:17 PM
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#1 |
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Registered User
Join Date: Jun 2017
Location: Gulfport, Mississippi
Posts: 26
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68 sending unit
So I recently replaced my gas tank and sending unit in my 68 c10 because my old one was a rust tub. I'm curious if anyone can help me wire up my sending unit cuz my gauge has always read at the 3 o'clock position.
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07-04-2017, 07:37 PM
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#2 |
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Senior Member
 
Join Date: Feb 2004
Location: Williamsburg, Ohio
Posts: 1,763
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Re: 68 sending unit
Happy 4th. Usually if the needle showed past full the connection from the tank --tan wire- has no ground- infinite resistance --completely open circuit.
If nothing has changed at the gauge and the fuse on the block for fuel is ok, with the key in on position, touching the tan wire to a solid ground should show on the gauge ---empty. If this is so --- make sure the new sending unit housing on one of the top 5 or 6 screws has a permanent jumper wire to a solid ground. The tan wire connects to the nutted stud on top of the gas tank sending unit. The sending unit controls the ground resistance --depending on amount of gas in tank--- back to the gauge. You can test the new sending unit out of the tank with the jumper wire to ground , the tan wire on the stud, and moving the float slowly up and down before you put in the tank and before putiing gas in the tank. If you get needle movement in the correct directions -- probably good to go. Usually from my experience, if the gauge reads past full ---gauge is probably ok.
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1942 Chevy 1/2 ton Rod, 1959 GMC 1/2 ton Fleet Stepside, 1967 Chevy SWB K10, 1985 Corvette Coupe 4+3, 2015 Chevy Duramax reg cab 4WD W/T Last edited by dennislbrooks; 07-04-2017 at 07:42 PM. Reason: words |
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07-04-2017, 11:14 PM
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#3 |
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Registered User
Join Date: Jun 2017
Location: Gulfport, Mississippi
Posts: 26
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Re: 68 sending unit
Ok thanks so basically I just run the tan wire from behind the dash to the nut on the sending unit?
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07-04-2017, 11:20 PM
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#4 |
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Registered User
Join Date: Jun 2017
Location: Gulfport, Mississippi
Posts: 26
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Re: 68 sending unit
Please post pictures if u got any it would help a lot
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07-04-2017, 11:44 PM
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#5 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,787
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Re: 68 sending unit
I did a quick search and got this thread.
http://67-72chevytrucks.com/vboard/s...d.php?t=640615
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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