garmin gpsmap 440s and airmar p17 transducer
I have a Garmin GPSMAP 440s and am trying to get them to work together. The tranducer has 3 wires (blue, black, clear) and all of the wiring diagrams say blue is depth +, black is depth -, and clear is either temp or shield. The garmin wiring diagram says pin 4 is depth +, pin 5 is depth -, and pin 6 is temp. Unfortunately when i hook it up this way, the unit says the transducer is disconnected and sounder is turned off.
Can anyone help figure out if this combination can be made to work and if so what im missing?