Great Boat Fuel Sending Unit Wiring

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Boat fuel sending unit wiring. Remove the screws that hold the sending. The fuel gauge reads the resistance to ground check the wires on the back of the gauge pink to s terminal and black to g terminal. The older float style which uses a magnet embedded in a float that resides in a tube sending readings of how high in the tank it is floating and there is the newer style that measures electrical resistance of the volume of fuel in the tank.

Note that if the gauge is grounded directly to a tab on the tank there may be no ground wire. The fuel sending unit is responsible for what the fuel gauge on your vehicle reads. When you make use of your finger or perhaps stick to the circuit with your eyes it is easy to mistrace the circuit.

Click on the image to enlarge and then save it to your computer by right clicking on the. The sending unit will ground through the mount screws. When you use your finger or the actual circuit along with your eyes it may be easy to mistrace the circuit.

Thumbor prod us east 1 photo aws arc pub marine fuel sending unit wiring diagram source. The sending wire will come off a post in the center of the flange. Both types however are wired the same way.

How to diagnose the problem. The fuel tank should be grounded and the sender wire pink should be connected to the sender terminal on the sending unit this is the correct wiring. Then disconnect both the sending wire and ground wire on the old sending unit.

There may also be a ground wire coming off a second post at the edge of the flange. How to test and replace your fuel sender unit on your boat. Boat fuel gauge might not work or reads the wrong fuel level.