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Digital or analog, the fuel gauge gets it signal from the fuel sending unit, which is typically located on top of the fuel tank. What you're looking at is most likely either a bad fuel sending unit, or a disrupted signal, which could be due to broken wiring or a short in the wiring. You'll need to drop the fuel tank, disconnect the fuel sending unit (it's usually just a weatherpack terminal), then check (with the key in the on position and the relay to the fuel pump pulled) to see if there's power to the fuel sending unit. If there is, then the fuel sending unit most likely needs to be replaced. If there isn't, then you need to trace the circuit and find the fault.

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Q: Why is the digital gas gauge stuck on full in your 89 Chrysler new yorker landau and how do you fix it?
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