SYSTEM / Electrical System ACCESSORY CIRCUIT 1. When the key switch is turned to the ACC posi- tion, terminal B is connected to terminal ACC in the key switch. 2. Current from key switch terminal ACC flows to radio (#12), cab light (#12), lighter (#13) and auxiliary (#15) through the fuse box and makes each accessory operable. Key Switch Fusible Link (45 A) Battery Fuse Box 12 13 15 Cab Light, Radio Cigarette Lighter Auxiliary T1J1-02-05-002 T2-5-5