Hi guys, after installing my new Lowrance Live 7 mfd, I am no getting a reading on my command speed gauge. The water speed line (hose from engine two gauge) I disconnected years ago but would like to have the gps speed reading back. All cables I disconnected from the old mfd were reattached to the new one. Cannot find any isolated wire from the gauge that could require a connection. Any ideas on how to get my speed back on the gauge would be appreciated.