Fuel Guage Sending Unit Not Working - Help!

[bryanredfish]

I had a slightly leaking sending unit gasket, which I replaced. No problem. Now, I get no reading at the guage, and I CAN'T FIGURE IT OUT! I put the unit in exactly as it was, all connections are good, plenty of battery power. I have family coming in for a big fishing outing, and I'm freaking out! Any assistance would be appreciated. It's a Todd tank, with the stock sending unit. Thanks.

 

[bryanredfish]

Re: Fuel Guage Sending Unit Not Working - Help!

Quick update: I ran to West Marine and got another sending unit. This did not fix the problem. I'm getting full voltage to the sending unit. The ground is fine, with a complete circuit. When I turn the key on, there is slight movement at the guage, but it goes past Empty (backwards), almost like reversed polarity. I did a quick guage check, and it's fine. Is there a switch or something I could have bumped on the old sending unit? I don't understand what went wrong. Everything worked FINE until I replaced the gasket! Any ideas?

 

[DJ]

Re: Fuel Guage Sending Unit Not Working - Help!

It's either a short, or the guage is shot.

 

[bryanredfish]

Re: Fuel Guage Sending Unit Not Working - Help!

Problem found. There is a metal connector that had broken loose at the sending unit (part that goes inside the tank). After letting the unit dry off, and a few spritzes of water, I soldered it back together. It works fine now. Every time I try these last-second repairs before major trips, I'll never know. Thanks for your advice.<br /><br />By the way, I would never had found the problem if I hadn't worked through the process of elimination. I was able to get it narrowed to the sending unit, inner workings.

 

[DJ]

Re: Fuel Guage Sending Unit Not Working - Help!

Bryan,<br /><br />Glad you found it. That was your short. That tab is actiually insulated from the tank.<br /><br />Go catch some fish.