I have a 2003 Club Car Ds Iq 48v cart. I have a 48v to 12v converter installed from everything carts. I have headlights and l.e.d. tail lights installed. When I drive the cart at night whether I just took it off the charger or have been driving it when I hit a steep incline the headlights will dim and shut off flicker and if I ease off the throttle they will come back on. Only happens on hills. This just started happening about 1 month ago and continues to happen. Any help or opinions would be greatly appreciated.