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.

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.

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?

Re: 68 sending unit
 

Please post pictures if u got any it would help a lot

Re: 68 sending unit
 

I did a quick search and got this thread.
http://67-72chevytrucks.com/vboard/s...d.php?t=640615