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Ed de Chazal wrote: "Seems to be a little corrosion at the terminal interfaces. These microswitches are all exposed and not waterproof and this kind of false indication is not what one needs.  Has anyone else experienced this and have recommendations to prevent?"

It only took some flying from wet runways to sometimes get a
permanent green light, regardless of gear position, due to internal
leakage in the microswitches. I replaced them with IP67 watertight
switches from Burgess, model V3SY1. These come with permanently attached wires that you can solder and shrink-wrap to get a weatherproof
connection. For other less exposed connections you can protect the contact surfaces with electrical contact grease.

Sven Jerlhagen
LNC2, SE-XOP

LML website:   http://www.olsusa.com/mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.