Got to our site yesterday and our power jacks at the panel had no power, thus we had no jacks. We have a 26y grey hawk 2018. Where should I look first?
When that happened to me, the ground cable from the pump motor to the motor home frame was broken. It broke at frame end due to a poor factory installation.
On ours the fuse is 15 amp and is located below the steering wheel where your knees would hit the plastic panel. Pull the panel out to get off and in the mess of wires look for a fuse holder. Mine was red. Be careful when replacing to not get wires hung in brake pedal. Hope this helps. Safe travels
Enjoy the journey
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Full timed in Newmar Essex. Off road now back in house.
Part time in 2020 Entegra esteem 29 v
2017 Jeep rubicon tow vehicle
As trapper said, you may need to remove the lower plastic dash panel to the left of the steering column. Behind it, there will be a mess of a wiring bundle. You should find one inline ato type fuse holder in that bundle. Be careful handling the wiring. There are a number of wires terminated in a large wire nut and it doesn't take much to pull the whole thing apart.
That's what it was for mine too. And for about 300 others on this forum. 
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