Sorry guys I posted this before but I am still trying to find out what is wrong with the summit. This has been an ongoing battle all winter. The machine runs well, but the headlight is dim and the warmers don't really work. I know that there must be a short but I cannot for the life of me find it. I guess my first question is that since I replaced the regulator, could I have a bad one? How do I test it? One guy mentioned that with it idling, if I unplug it and everything gets brighter then that is what is wrong. Now I realize that revving the motor like this would most likely blow the bulbs, but idling will this work? Secondly, does ne one have any more ideas? I should mention that this sled has electric start and as such has a different regulator. Thanks in advance for any insight.