Fuel gauge question

[bighealeysource]

Got a used Smiths "hanging needle" gauge to put in my 100M and in great condition. Before sending it to Nissonger for a check up or repair, quick question. When I hooked it up to my harness the needle would slowly swing up to 3/4 full regardless of which way the leads were hooked up. Problem is the tank was 1/4 full based on an existing gauge in a BN6 which is new and accurate as well as the old dependable measuring stick. IS there something else I can try to see if it is working correctly before shipping off to Nissonger ?
Thanks,
Mike

 

[red57]

Mike,
I wouldn't bother testing it. Just send it to Nissonger. I have sent them several 'dead' gages and they can rebuild and make them work like new. If they get a gage that is not repairable, they will let you know. The only time I have had difficulties was a gage with a broken needle and they didn't have a replacement needle - so I sent them another 'dead' gage and they swapped needles.

Dave

 

[Swoz]

Mike,
Make sure the gauge case has a good ground connection, or it will not read properly.

The back of your fuel gauge should have a "B" and a "T" terminal. If you have an ohm meter you could measure the resistance from the "T" terminal to the case ground, which should give a reading of about 100 ohms. If you test from the "B" terminal to the "T" terminal you should read about 60 ohms. These readings would indicate that the two coils internal to the gauge are in fact good. The rest of the parts in the gauge are not likely to go bad. So, if your coils are good and your not missing any parts, Nissonger will basically clean (new chrome bezel, glass...etc) and calibrate your gauge. If one or more of the coils are defective, they can still repair it it, but it will cost a bit more......Tony

 

[Keoke]

Dave I wouldn't bother testing it either. Just send it to Nissonger---Keoke---