Have an 83 gl650. The temp gauge not working so I tested it with a 6 volt battery and it went up, so I know it works then I tested the 7 v regulator and I was not getting the 7 v so I thought Bingo, but when I unplugged the green wire coming from the sending unit the regulator gave me a full 7 volts reading so I was like WAH. Well I can get the 7 v all the time but when I plug the sending unit wire bye bye 7 v any idea if this is the way it works or something is bad ? My fan never comes on either but I jumped the wires out of the thermoswitch and it ran so I think I'm good there, maybe just replace that switch. I'm pretty new working on bikes. I recently moved from the Honda civic game into the Gl game thanks for the help!