Mobile-i to Oitez N02CD 4-way 2.5mm plug

Started by simon_pengelly, Oct 20, 2014, 20:14

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GPS data module to Oitez car dvr is a 4-way 2.5mm jack plug.
Presumably it has ground and 5v to power the GPS module and Data pair to the dvr
Anybody know which of the four connectors does what?