ELECTRICAL SYSTEM - GRAPPLE SKIDDER KEY DESCRIPTION KEY DESCRIPTION 1 - BOOM FLOOD AND TAIL LIGHT GROUND 17 - INSTRUMENT PANEL HARNESS 2 - RIGHT-TO-LEFT BOOM FLOOD LIGHT LEAD 18 - WIPER MOTOR 3 - [03K08] ELECTRICAL SYSTEM 9015 640 Log Skidder and Grapple Log Skidder PC1518 in SKIDDER, LOG 640