Once you get your head round how all the RRE electrical systems work it's a pretty simple truck & easy to work on.

Its very rare to get a true electrical fault on an RRE, only one's we seem to see now are where someone's knocked a sensor, bent a sensor bar on the mast or the mast cable gets damaged as in your case.

Sometimes the calibrations need a little adjustment after a while but that's simple enough to do.
The on board diagnostics with the aid of can key makes life simple,