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Wiring - gas gauge

JarcoJarco
I got a set of the Chinese gauges and though my gas tank is empty, it shows as full. This is the first time I've hooked it up since I got the new gauges and swapped out the CMC gauges.

I verified the wire from the tank sending unit is on the bottom terminal, positive on top and "brown" on the side (although my wires are all different colors). Is some wire switched or is there a sending unit difference issue? If I were to try and swap two wires, which would I swap?

SKIPTOWN Mike

1957 CMC Speedster (SKIPTWN)

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JarcoJarco
I got a set of the Chinese gauges and though my gas tank is empty, it shows as full. This is the first time I've hooked it up since I got the new gauges and swapped out the CMC gauges.

I verified the wire from the tank sending unit is on the bottom terminal, positive on top and "brown" on the side (although my wires are all different colors). Is some wire switched or is there a sending unit difference issue? If I were to try and swap two wires, which would I swap?
oldyeleroldyeler
Realy! Reversing the polarity wont do it. You must bend the float wire the other way.

Also test it before you reinstall it you will have to adjust the stops and bend them to get the full reading and empty reading to match up with the float positions.

The baffles in some tanks also can cause problems. you may also have to bend the wire horzonaly right or left to clear any obstructons in the tank to get full float travel.

Good Luck!!
B bvandeursen
If the sender & gauge came from the same source, this PROBABLY isn't your problem, but.... the ohm range is different from one manufacturer to another. If the sender wasn't properly matched to the gauge it would read incorrectly. This is true for all gauges,pressure, temperature fuel,etc.
For instance:
VDO = 10-180 ohms
Classic, Isspro, Haneline, others = 240-33 ohms
GM = 0-90 ohms
Ford = 75-10 ohms
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