Thank you High Wire..thought that was the case but just wanted to be sure. Had a problem last summer in that the lower helm temp guage worked but not the upper helm. Assumed that the sending unit was ok because one guage worked..so instead of swapping guages, I just ran a temp wire to the upper helm and it worked. I guess that the original wire broke or it has significant corrosion someplace. I will just leave it as is and permanently string the replacement wire. Again, thanks, cliff