OK, this is a just a quick post to remind everybody of the golden rule of building a Van’s aircraft: If something doesn’t work, then double check everything in the instructions because you’re doing something wrong.
In this case, I assumed since this was physical drop-in-replacement that all I had to do was drop it in. Instruction #8, in turn, refers to the elaborate (and I must admit, not the most well written document) which says to load the appropriate configuration file, 12-GPS-2020-PRE-SETS_01-14-16.dfg. Note that this is not the same as the 12-GPS-250-PRE-SETS_01-14-16.dfg which I have had loaded since last year.
How did I realize this? Well, recall that I had determined that the 2020 "wasn’t working", so I took off the canopy and the avionics bay. I figured out that the old 250 still worked by soldering pins on the cut-off wires and individually putting them in the socket of the Control Module, and it worked perfectly. I concluded that I had received a bad 2020. I ordered a replacement and finally got to the airport. This time I was smart enough to not undo anything before I had to. I inserted the plug from the 2nd 2020 and—lo & behold—it didn’t work either. That’s when the light bulb illuminated that I had failed to follow Rule #1 and Rule #2.
Sigh. Now all I have to do is put the avionics bay cover on and reattach the canopy.
8/31/16: Removed SV-GPS-250, replaced with SV-GPS-2020 IAW Van’s Notification 16-01-16.
(s) DBHill 3132802 RLSA-I.