(?) Mark indicates neither a solid positive battery or negative battery signal. Values are not easily replicated due to internal voltages. All other are marked as positive or negative when the correct switches for that circuit are made... for troubleshooting purposes. Have not yet gone into testing the cdi for known good resistances. Just trying to get my buddies quad going for his son. CLH22110@gmail.com. for more info please put 185 bayou in the header. Cant believe this was so hard to find.