I have connected my SC1000 speedometer guage to my LXC17 GPS unit the way the diagram instructed that was posted on this site. I went through and made the changes in the guages and the gps unit. After wiring it up and making the changes I took off for the lake. Once I got there and started across the water the speedometer was not registering, the gps unit was registering 65mph. I would like to get this fixed, due to the glare on the gps unit from the sun it makes it the unit hard to see. Is there anyone who can HELP me. It would be easier the see the speedometer than the gps unit while running across the water. I would appreciate any help anyone wants to provide. Allan Lynn Iowa Park, TX