Hi, I have 1954 Pontiac Star Chief the gas gauge when off is just below empty, turn the key on and it go's to empty.  I grounded the wire and I get the same thing.  When I leave the wire disconnected and not grounded  and then turn the key on, the gauge go's to full!!    Any Ideas ?

Thanks for any info

 

hi mike, are you talking about the wire to the sender unit ? and your testing at the tank end of the wire ? 

if so, when you ground it you should be getting full on your gauge ? 

disconnected it should be below the empty line, 

Yes the wire going to the sender.  Disconnect  the wire and it reads full.  If you ground that wire it read empty when it should read full like you said.  I have never run into to this before.   

That sounds like a fault with your gauge Mike 

Thanks, I will look into that 

 

Looking for a gas gauge any ideas 

I will have a hunt around the internet mike 

just a thought 

my be do that same ground test at the back of the gauge justA incase 

and maybe look for a instrument repair firm 

Bob’s Speedometers in Howell Michigan can rebuild/restore you fuel gage and any other gages. There might be someone closer, to you as well.

https://www.bobsspeedometer.com

 

Edited March 9, 20251 yr by Frosty

Thanks for the info 

Let us know what happens next please.

Well I removed the gauge and tested it, it seems to be shorting out no matter where I put the test leads it makes  continuity.  I sent the gauge out for repair. I will let you know what they said. Thanks

2 hours ago, Mikei16 said:

Well I removed the gauge and tested it, it seems to be shorting out no matter where I put the test leads it makes  continuity.  I sent the gauge out for repair. I will let you know what they said. Thanks

well done Mike, i struggled to find any one who has them for sale !!!