I have a 1998 and 97 formula Z. The heated sheilds quit working on both sleds. When I checked the voltage at the plug it was 2 volts on one sled and 1 volt on the other. I then checked the headlight, which was nice and bright, and it to was 2 volts on one machine and 1.25 volts on another. I did check the meter on my 01 FD600 and it read 13.8 volts. We then tried to switch the V-regulator from one sled to the onther and it made no difference. The 2 volt sled was 2 volts and it did not matter which regulator we used. Any information about the electrical system would be of great help. Thanks folks!!!!