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Re: 5volt not working on power distribution board
If you probe the voltage of the 5v supply on the PD board with a multimeter and it shows 0v, then the 5v supply is dead.
I had this issue on our mule vehicle, and just got 5v from the DSC's sensor power bus. I don't know the current source limit of the DSC's 5v bus, but it's enough to power one camera (with nothing else on 5v power). There is no rule prohibiting this arrangement, although it's sub optimal if you have a lot of sensors and stuff and overload the 5v bus.
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Williams International - Commercial Engines - Controls and Accessories
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