2008 discovery 40x loses power while driving
I have a 08 discovery on a frieghtliner chassis Cummins pusher. A few times now while driving, I lose power to the dash, shutting engine off. Brake controller won’t light up, nothing that requires ignition power will not work. After a moment power comes back on. This has happened also while parked when I try to retract my sunshades, because they require accessory power on to work. This last time I was passing a semi on I70 and lost all power. Coasted while the semi passed me back and I was able to coast to the edge. I70 doesn’t have much shoulder space so it was scary. I’m afraid to take it on another trip. After power regained I was able to drive from Salina Kansas all the back to Vegas with out issue. But since this is a reoccurring issue, I need to dig into it before I feel confident to take another trip. Any help guidance. Things I’ve checked: batteries good, fuses good, relays in the fuse box should be good (I player swap the relay and no issues followed to the new position)
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