68 tank sending unit testing

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Mar 23, 2008 | 11:11 AM

AWilson

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Drifting

Joined: Jun 2006

Posts: 1,912

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From: Schaumburg (Chicago) Illinois

68 tank sending unit testing

Can anyone tell me how to test the tank sending unit on a 68 for proper function?

Mar 23, 2008 | 11:28 AM

682XLR8

Safety Car

Joined: Dec 2005

Posts: 4,270

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From: Central Michigan

Do you have the sending unit out of the tank? If so, hook up a volt meter, and ground it to the body of the unit. In the down position(empty) you should read about 9 ohms, and you should see the ohms decrease as you move the float up to the full position

Mar 23, 2008 | 01:36 PM

Alan 71

Team Owner

Joined: Sep 2006

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From: Westminster Maryland

68,
I agree, except that I believe it's 90 ohms.
Regards,
Alan

Mar 23, 2008 | 02:54 PM

A88FXRS

Racer

Joined: Dec 2007

Posts: 374

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From: PHILADELPHIA PA

approx 90 ohms empty

Mar 28, 2008 | 08:59 AM

AWilson

Thread Starter

Drifting

Joined: Jun 2006

Posts: 1,912

Likes: 12

From: Schaumburg (Chicago) Illinois

thanks guys. Mine doesn't work! I cleaned the contacts to make sure, and it isn't working. So I bought a new one and I checked my method of testing and it was nice and gradual all the way to about 90 ohms. So the old one definitely doesn't work.

Thanks!

Mar 28, 2008 | 12:21 PM

68/70Vette

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Joined: Jul 2004

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From: Redondo Beach, California

The original Delco senders are still available. Rock Auto has them for about $118. Also, Dr Rebuild has them for about the same price. He doesn't describe them as Delco but he does describe them as NOS. Repro versions are about $70.