5 Multiplexed Electrical System Service Manual 5 - 6 PM819023/KM815057 (08/14/2012) Conn Pin Number Circuit Function D 1 Power - ignition 2 General purpose wakeup 3 Power - accessory 4 Hazard 5 Brake switch 6 Spare digital input 7 Park brake active 8 Fog lamps (1st set) 9 MCS back switch 10 Cruise on/off 11 Interaxle lock telltale 12 Park lamp (Kenworth) 13 Tractor ABS telltale 14 Trailer ABS telltale 15 Check engine telltale 16 Stop engine telltale 17 Windshield wiper (fast) 18 Secondary fog lamps 19 Editable telltale 1 20 Editable telltale 2 21 Editable telltale 3 22 Spare 23 Editable telltale 5 24 Editable telltale 6 25 Editable telltale 7 26 Spare 27 Spare 28 Dash buzzer 1A 29 Dash buzzer 1B 30 Dash buzzer 1C 31 Dash buzzer 2 32 F-CAN high 33 F-CAN low 34 I-CAN high 35 I-CAN low 36 I-CAN ground 37 V-CAN high 38 V-CAN low 39 V-CAN ground 40 V-CAN low terminated E 1 Idle timer relay 2 Windshield wiper relay 3 Ignition relay (Start) 4 Cab marker/clearance lamp relay 5 Ground 6 LVD Bus 1 7 Park lamp relay 8 Trailer marker/clearance lamp relay 9 Mirror heat relay