Hopefully someone can get me going in the right direction. I'm experienced in electronics but brand new to astronomy. I have my Dad's old Celestron Super C8 Plus or more likely it is a Powerstar 8. (Has both manuals but it is DC powered). The drive is not working (no LED illumination on the hand unit and the drive does not move). I have no battery pack, only a 12V plug-in for a cigarette lighter which is not a perfect fit into the hand unit's 12v receptacle. The cigarette lighter adaptor plug / jack is conventionally wired with "+" on the center pin. (I have seen in posts that the 12V jack might be wired opposite and that a voltage regulator could be blown out). Does anyone have any advice, schematic, or documentation that they could point me to?