ELECTRICAL SYSTEM - SKIDDER AND GRAPPLE SKIDDER (SERIAL NO. 257646- ) KEY DESCRIPTION KEY DESCRIPTION 1 - BOOM LIGHTS (GRAPPLE SKIDDER ONLY) 13 - FRONT CANOPY LIGHTS (GRAPPLE SKIDDER 2 - LOG ARCH HARNESS [03G01] ELECTRICAL SYSTEM 9015 540B Log Skidder and Grapple Log Skidder PC1524 in SKIDDER, LOG 540B