The new locker switch is in and working in the rt side coffee cup cavity. It is a simple on-off-on motor switch DPDT, $6, but to use it requires jumpering diagonally across the switch for 12v and ground. It is ac rated which means it may be less "robust" than dc - rated , but not worried based on unreliability of $ 50 VDD1 sw's. The Deutsch connector pins demand a dedicated crimp tool which I did not have . Lot's of labor here . Re non-conductive film on switch contacts...I always blasted 100 psi air under cowl to clean off dust...hmm perhaps driving dust into harness and sw openings?
For arpy- plenty of new smart sw's online around $270. It may be an even cost trade off between "trying" another smart switch and going "dumb switch" if you do not have experience with harness, etc. There are "pigtail" harnesses shown on several parts stores for GT 48 and GT 52 models (are they the correct ones?), but finding anyone to make the conversion might be difficult ,and shop rates could quickly equal or exceed the cost of a replacemnt smart switch...a fraught decision.