This is a instrument cluster out of mid 2000 gm vehicle. I repair quite a few of these but always have to have the vehicle to test or fix what usually goes wrong and hope for the best. But was wanting a way to bench test all the gauges. I probably can't just apply a small voltage each gauge to make sure everything works. Or would it need to be a signal of some sort. I have seen some things on youtube where they were making the gauges sweep with it hooked to a computer. How hard would any of this be to do. Thanks in advance