Auxiliary Fuel System Wiring (6388, 6588 and 6788 Tractors) WITH AUX. MAIN HARNESS FENDER HARNESS FUEL SYSTEM DK GR/WH WITHOUT AUX. FUEL SYSTEM GY/BK DK BL/WH FRONT HARNESS GY/BK GY/BK LT GN/BK OK BL/WH oe FRONT rd < = o TANK w a = (AUX.) < yp trae SENDING a © UNIT z K REAR (AUX.) A C) O - O TANK TO FUSE SENDING TO ALT. RESISTOR giock O O UNIT TERMINAL 10 | KEY SIDE x, IK ms FLOAT SWITCH — IN FRONT TANK = +12VDC = (POS) GND. TO ae WITH AUX. FUEL SYSTEM: NEG. SIDE OF LIGHTING A NEW SENDING UNIT IS USED IN BOTH FRONT AND SYSTEM REAR FUEL TANKS. WIRES OK BL/WH WITH BR/WH ARE CONNECTED TOGETHER AND WIRES DK GR/WH WITH GY/BK. WITHOUT AUX. FUEL SYSTEM: COLOR CODE A SEPARATE SENDING UNIT (DIFFERENT FROM ONE BK-BLACK GR-GREEN IN AUX. SYSTEM ) IS USED FOR FRONT FUEL TANK. BL—BLUE WH-WHITE WIRES DK BL/WH WITH GY/BK ARE CONNECTED TO. BR-BROWN DK-—DARK GETHER, BUT WIRES 8R/WH AND OK GR/WH ARE LEFT GY-GRAY LT-LIGHT UNCONNECTED. RIGHT-HAND FRONT TURN SIGNAL LIGHT HARNESS ASS’Y. MAIN CAB CABLE 5 () ~ [font OF CAB Ss | o- —_ foe) et So = ao) WINDSHIELD Os WIPER MOTOR Te] =o L. : 26 a YW © @ HIGH PRESSURE © “. SWITCH | Oe © | oo of -E———) i — =) ) &§ ORE, oe BL 1 | ! AIC COMPRESSOR |||; CLUTCH Att rr id | eon LEFT-HAND FRONT TURN SIGNAL LIGHT WH/GR ORANGE YELLOW RIGHT-HAND REAR TURN SIGNAL LIGHT DOOR SWITCH ill INDICATING LIGHT LOCK-OUT CUT-OFF SWITCH uw = a) a SWITCH ASS'Y. BLOWER COOLING CIRCUIT THERMOSTAT BREAKER SWITCH (OPTION) NOTE: ATTACH RADIO POWER CABLE TO 90° SPADE TERMINAL OOOR MANUAL REAR OF CAB b OOCOOD 55505 COLOR CODE WH-—WHITE YL-YELLOW GR-GREEN OR-—ORANGE RO-—RED BK-BLACK BL-BLUE P.M. BLOWER MOTOR LOW PRESSURE SWITCH WH/RD LEFT-HAND SIDE OF CAB LEFT-HAND REAR DOOR SWITCH ||| TURN SIGNAL LIGHT Data Center 1A “TI ) (6388, 6588 and 6788 Tractors) BK BK BK DATA CENTER ax—{r xx] DATA CENTER t+ POWER CONNECTION INTERNAL SPLICE se IN HARNESS INTERNAL SPLICE TO HARNESS LT GN/BK ROIVI OPEN vi FUSE BLOCK KEY SWITCH ENGINE RPM = TRANSDUCER o AD/BK = @ oa x O al —— OIX ] | otx BATTERY | a = omnl GROUND SPEED MPH TRANSDUCER EXHAUST GAS TEMP PROBE VLRO YL/RO COOLANT LEVEL PROBE YU/RO ENGINE HARNESS CONNECTION WITH MAIN HARNESS RO COLOR CODE BK-BLACK BL-BLUE GN-GREEN RO-RED ViI-VIOLET WH-WHITE YL-YELLOW LT~LIGHT