mystery lights

samedi 24 janvier 2015

i am totally removing all the interior skin on my 73 land yacht



in the tail light housings, there is some sort of sensor or something, not related to the 1157 bulb

this mystery item is a copper ring pressed directly into the center of the housing for the tail light housing

then there is a rubber housing that the sensor lives in.



there is no ground,and appears to be some sort of resistance wire from the said sensor(thats all i can think that it is)

I've traced the wires and the 2 sensor wires don't apparently go to the trailer light plug.



any ideas as to what these are?




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