I just bought a 98 S70 and the fuel gauge doesn't register. The car runs fine but nothing shows on the gauge. Would I need to replace the fuel gauge, the entire Fuel pump, or can just the Fuel Sending unit be replace? Also if the fuel gauge doesn't work will the Low Fuel warning light still work on this car?

Thanks for any help

 

The fuel gauge and fuel sending unit are very easy to test and in about 15 minutes you will know exactly what's wrong.

First thing you need to do is check all the fuses and make sure you are getting power to the gauge. If the other gauges are working, then you can safely assume power is coming into the cluster (red/yellow wire).Then check the black/yellow wire at the fuel tank connector and make sure you have a good ground.

If power and ground are good, then ground the yellow/white wire at the fuel tank connector. If the fuel gauge goes all the way to FULL, you have a bad sending unit. If it stays at Empty, you have a bad gauge or an open in the yellow/white wire.

Ford has a special tester for the Anti-Slosh module. But if you replace the fuel level sending unit and fuel gauge, and assuming the wiring is indeed good, then it's a pretty good bet the Anti-Slosh module is bad.


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