what year? 48 volt? you say a coil on solenoid? so it should be between a 1995 and 97 reagan cart......that coil should not get cherry red like that while driving so it could be your reagan solenoid acting up which would cause power loss but question is why?? it could be just a bad solenoid or in the activation circuit, maybe start by changing that solenoid see if it cures problem....................................
