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Looking for some wiring help: want to connect a HDS 7 gen 2 to a Standard Horizon DSC GX1000S VHF Here's what the Standard Horizon connection chart shows: White - External Speaker (+) ................ Connect to externla 4 Ohm Audio speaker Shield - External Speaker (-) .............. Connect to 4 Ohm Audio speaker Blue - NMEA Input (+) ............... Connect to NMEA (+) output of GPS Green - NMEA ground (-) .............. Connect to ground of GPS Purple - NMEA Output (+) ................ Connect to (+) input of GPS Here's what the HDS Chart shows; HDS Device Green RX (-) Transmit (-) Orange RX (+) Transmit (+) Shield (Ground) Ground Yellow TX (+) Receive (+) Blue TX (-) Receive (-) This is a NMEA 0183 set up. I tried pretty well everything I could think of based on these descriptions, and the radio continued to read NO POS. From the radio green purple and blue are a set, white and shield are a set. Both radio and FF need NMEA 0183 version 2.0 or higher to communicate. The HDS is set to communicate by default anybody done a similar set up?