We had to run a long gravel section of road construction in southern BC. The rocks thrown up at the leading side of the trailer axle severed the modest factory zip ties holding up the electric brake supply wires. Even though the wires had been behind (on the leeward side) of the axle, the broken zip ties allowed them to relax off the axle, and then they were taking enough rock chip hits to sever near the connectors.

When I noticed a lack of trailer braking assist, I found the physical damage, and we got the WanderPod into a helpful dealer, and they re-zipped and redid the connectors for a shade over $50. Nice dealer. We happily bought a few things from their accessories room to support them also. At the next campsite, I took 90 minutes on a sunny afternoon to go on "split loom & zip tie patrol."

I replaced some zip ties with thicker ones, then used sections of split loom pieces to protect all the exposed segments of wiring I could find under there. I also then decided to protect the various small wire leads that send the tank level status info to the control board inside. (That way twigs and weeds won't ever have their way on those small gauge wires.)

After this general loom-protecting patrol, I used other zip-ties to tie pairs of loom-covered wires together so they could gain support from each other and also stay more put. 

In the end, with my underbody grunt work, I will worry a lot less now (when forced to run future gravel construction zones) about rock fragments damaging systems like they did before.

Oh, and thanks again for your tip on trailer speed. It's supposed to be "liesure" travel, ain't that right?