Something I forgot to mention yesterday amid my flurry of activity, I installed a little LED light in the dash that I wired into the radiator-fan relay.
Now any time that the radiator fan kicks in I'll know about it.
It kicks in more often that I thought
Not too often I guess, a time or two during the longest leg of my commute. when I opened up the grille opening it switches off within 15 seconds or so.
Still it's made me re-think the variable grille opening. I'm probably going to come up with a way to make the opening bigger...
When I got home my little digital voltmeter had arrived, so I went ahead and gave it a home in an unused compartment-thingie in the console.
Here's the old DMM on the dashboard setup. It always goes flying when taking a curve, so I'm glad to be rid of it.
Here's the new digital voltmeter.