all dash gages are out, tachometer, speedometor, odeoeter/tripmeter, fuelgauge, lights are all out, would this be a fuse or something else, and if something else, would it be easy to fix? optima ex 6 cyl, 2004
If you know your battery has at least 12 volts and you have power to other things in the car, dome lights etc., then the fuses would be the first place to start, (2) then the wire connection on the back of the Instrument cluster, then (3) the ECU. But being you've lost everything, I'd suspect a fuse to the ECU. I don't have a wire schematic in front of right now to be able to tell you which fuses feed your ECU.
Good Luck and let us know what you find. DJ
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