Wiring HDS 5 to Radio - What color goes to what

[mdrducks]

I'm struggling trying to wire HDS 5 to radio. The HDS 5 has 5 wires

- yellow TX (+)

- blue TX (-)

- orange RX (-)

- green RX (-)

- shield (ground)

I have 2 radios; each on a differnt boat

Cobra MR F75 has a GPS jack that plugs to radio. Jack wires are red and black

Uniden

- orange = external speaker +

- black = external speaker -

- green = GPS data in

- red = DC +13.8 V

- bare wire = PA - (GND)

- brown = PA +

- blue = NA

Can someone help with what wires go to which for each radio?

[HPORT]

I'll put my two cents in,

HDS NMEA + Yellow ( data transmit), connect to Radio NMEA Receive green wire on the Uniden and most likely the red wire on the cobra

HDS NMEA - Blue ( common transmit), connect to radio common or ground wire on the uniden and most likely the black wire on the cobra radio

Just think of the HDS transmit ( TX) wires as a means of transmitting the GPS communication to whatever device you have that needs to see the GPS coordinates.

Inversely, if the HDS needs NMEA input, you will get that through the orange and green wires.

Let me know how you make out,

JC