Does anyone know where the single white wire attaches too. This is an older Gaffrig Precision Instruments GPS Speedometer with Recall. Wiring diagram would greatly help.

Thanks in advance.

Ed

Could it be the GPS receiver antenna?

Possibly light

Thanks for replies. Hoping someone has hooked these up before. I know if start guessing on wires.....the wrong wire will fry unit.

Call Gaffric????

Padraig

check to see if this helps,:

https://www.riverdavesplace.com/foru...ut-100.149113/

You could disconnect single white wire, power up and see if GPS reception degrades.

Gaffrig Precision Instruments is now Livorsi

Thanks to all. I have pretty much determined that the single white wire is the signal wire. Can either be landed on the antenna circuit or the NMEA 2000 GPS circuit for signal

Ed