Quote:
Originally Posted by 40 Deluxe
Sometimes you can get the proper voltage meter reading or a test light to glow and still have a bad connection. It is only letting a small amount of current to flow, enough for the light, but when more is needed, the connection opens. I've seen this a lot working on snow plow trucks that see a lot of salt. The salt gets in and corrodes a wire so all those lights on the back are dead, yet a test light will work fine.
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Again going back to my aviation days, I remember a mechanic cursing up a storm while working on a wing tip light. I asked what was going on and he told me that the meter showed voltage at the socket, the bulb tested good but it would not light. I told him he had a bad splice somewhere in the wire. Sure enough he came up the the radio shop later and told be he found a bad repair of the wire in the wing.