The resistance of your fuel sender should match that of your gauge. For instance the resistance that the stock gauge in a 55 Chevy has a worth of zero ohms when empty and also 30 ohms as soon as full. The following list is for stock gauges and some renowned aftermarket brands:

Ford as much as 1986 - 73-10 OhmsFord 1987 & increase - 16-158 OhmsGM up to 1964 - 0-30 OhmsGM 1965-1997 - 0-90 OhmsGM 1998 & up - 40-250 OhmsMopar as much as 1986 - 73-10 OhmsAMC 1950-1977 - 73-10 OhmsAutometer -240-33 Ohmsis the many common however other ohm arrays are madeClassic instruments - 240-33 Ohms(excluding vehicle certain gaugekits i m sorry use manufacturing facility ohm range)Dolphin - 0-90 OhmsDakota Digital - Programmable to job-related with most Ohm variety sendersVDO - 10-180 Ohms

The first number represents the north Ohm reading and the 2nd number is the complete reading.

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My fuel gauge only reads empty.

If you cannot make her gauge review anything but empty then relying on your ohm selection you may have actually one that the complying with problems:

If you have actually a 0-30, 0-90, and 10-180 Ohm sender then most likely your sender lead wire is grounding out somewhere. Or perhaps the center terminal top top the sending unit itself is ground connection out against the body of the car.

If you have actually a 240-33 or 73-10 Ohm sender then the sender might not have a appropriate ground or over there is a break in the sender command wire.

My fuel gauge just reads full.

If you cannot make your gauge review anything but full then relying on your ohm selection you may have one the the complying with problems:

If you have a 0-30, 0-90 or 10-180 Ohm sender then the sender might not have a proper ground or there is a break in the sender lead wire.

If you have a 240-33 or 73-10 Ohm sender climate most most likely your sender lead cable is grounding out somewhere. Or possibly the facility terminal ~ above the sending unit chin is ground connection out against the body of the car.


Sender Bolt pattern & Swing

Our tanks are collection up because that the conventional SAE 5-hole bolt pattern supplied by every one of the aftermarket gauge manufacturers. The 5-holes room not evenly spaced. 2 of the holes room farther apart than the various other holes. If you space holding the sender with those two holes the next to your body, the feet directly across is recognized as the index hole. If the float swings to the right, it is a right-swing sender . If it ferris wheel to the left, the is a left-swing sender.

Will this sender job-related with a 6 volt system?

Yes. Your fuel gauge is simply reading a resistance to ground. Since your gauge is just reading the lot of resistance come ground this sender will work regardless the the voltage of your car.

How go a fuel sender work?

Fuel senders have actually a rheostat that offers a resistance to ground. As the fuel eight moves from the north to the complete position a contact is moved across the plank on the rheostat which varies the resistance checked out by the fuel gauge. For instance a 69 Camaro has actually a 0-90 ohm fuel sender. Once the sender is at the empty position the rheostat is not creating any resistance to ground (zero ohms). Once the fuel sender is in the complete position the rheostat is creating 90 ohms the resistance to ground. Due to the fact that the gauge is analysis a resistance come ground having suitable grounding the the sending unit is essential to get specific reading on your fuel gauge.

How carry out I test my fuel sender?

A fuel sender have the right to be bench tested v a multimeter. V the multimeter collection to the Ω setup put the red probe on the post that is the gauge lead and also put the black color probe on the ground write-up or top top the body of the fuel sender. Record your readings v the fuel sender in the north position and in the complete position. Those two numbers will tell girlfriend the ohm selection is of your sender.


Why does mine gauge review backwards?

The first step would be to make certain that you have actually the proper ohm range fuel sender to enhance your gauges. For example a 73-10 ohm fuel sender would check out backwards on a 0-90 ohm fuel gauge. If you discover you have the exactly ohm selection fuel sender make certain that the float arm is installed on the exactly side. The former of the rheostat reflects which side the float must stick the end from. If the float eight is mounted on the various other side the gauge will review backwards. Also if the rheostat is set up upside under the gauge will check out backwards.

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I take it my sender apart and now that doesn't work.

If for some reason you have disassembled her sender and now can't gain it come read check the following:

Make sure that the clip is in full contact with the flange. There should be complete continuity in between the metal strip between the rheostat and also the bracket and also the bracket and also the flange.Make certain that the facility gauge lead article is isolated indigenous the flange and bracket. If that post is grounding out girlfriend will just see zero ohms ~ above a gauge or multimeter.


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