My hubby took the day off, and while driving the truck first the radio
intermittently cut out (display and sound)... driving it a bit later the
radio cut out again, then completely, and he noticed the turn signals
also would not work.

Went home, turned truck off, called dealer, drove it over to the dealer
later, and all was working fine.

Of course since it was fine upon arrival, dealer wouldn't even look at
it, but said that turning it off and back on may have fixed the error
(darn, rebooting the truck fixes it?  Wow.) When I got home I looked for
codes, but no new ones.

Any clue what this could be?  My understanding is the radio and turn
signals are on two separate circuits... so why would they both go out at
the same time.

As it was daylight, we don't know if any other lights were affected.

The recall concerning rerouting the wiring under the clutch was just
done last week...

Any help appreciated.  We thought maybe it was migrating water, as a
power hose was used on it last week by the dealer to clear off the
radiator fluid all over the drivers' side of the engine...

jmc