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99 sportster lx, only my speedo's work...

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Just wondering where I should start...

Just bought the boat and every single gauge is shot besides for the two speedos. Rpm will just sit at a random spot, whether it's 0, 2000, or 7000, it will just pick a spot at startup and sit there. Fuel gauge needle is either all the way past full, like 45 degrees past full... Or empty, doesn't change as I use fuel. Engine temp sometimes reads in the middle then drops or goes back and forth randomly. Oil pressure sometimes reads, other times it won't.

I can't imagine all the gauges are shot... Or is it a possibility? I remember seeing somewhere that the ground for the gauges is sometimes bad, but I wanted to ask for some input before I go and start pulling wires.

***i tried unplugging and re-plugging the rpm gauges several times in case of corrosion. It didn't help

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Pick one gauge and run a separate ground direct to the battery and see if your problem changes. I am with you on the diagnosis. All of them are most likely not bad at the same time. This will at least give you a reference point.

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