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How to communicate with TRW rain and light sensor

Posted: 2017 Dec 20 15:06
by Ed Harris
I have a TRW rain and light sensor that I want to use out of the vehicle (often installed in VW vehicles). There are only gnd, vcc and signal wires. The signal wire goes strait to the CECM (central control module I think). The output probably varies with rain intensity but I only need rain or no rain. can anyone suggest how to go about this. How would you connect a one wire system to a two wire plc or CAN BUS usb converter?