TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 CIRCUIT NUMBERS & DESCRIPTION 1 GENERATOR (FIELD) 51 DIMMER SWITCH 2 GENERATOR (CHARGE) 52 HEAD LIGHT-HI-BEAM 6 REGULATOR,VOLT (FIELD RELAY) 53 HEAD LIGHT-LO-BEAM 7 REGULATOR, VOLT (CHARGE) 54 PARKING LIGHTS 11 GROUND 55 DIR. SIGNAL SWITCH 14 MAIN FEELD 56 DIR. SIGNAL LIGHTS-LEFT 15 KEY SWITCH 57 DIR. SIGNAL LIGHTS-RIGHT 16 IGNITION 58 CLEAR., IDENT., & MARKER LIGHTS 17 STARTING CONTROI 60 HAZARD SWITCH 18 GLOW PLUG,PRE HEATER 62 PANEL LIGHTS 19 FUEL SHUT-OFF 63 DOME &/OR COURTESY LIGHTS 21 ET HER 69 TAIL LIGHT 23 MAGNETIC FAN 70 STOP LIGHT 24 EXHAUST BRAKE 71 BACK-UP LIGHT 28 ,NSTRUMENT 72 TRAILER 29 ENG WATER TEMP 75 HEATER 50 ENG OIL TEMP 76 LEFROSTER 31 TRANS OIL TEMP 77 AIR f )NDITIONER 32 AXLE OIL TEMP 78 HEAETO MIRROR 33 ENG OIL LEVEL 80 ACCESSORY FEED 34 WATER LEVEL 82 WINDSHIELD WIPER 35 ENG OIL PRESSURE 84 'IGAR LIGHTER 36 FUEL LEVEL 85 HORN 37 FUEL PUMP 86 RADIO 87 WINSHIELD WASHER 88 HOURMETER 42 FRT AXLE WARNING 90 HY-POWER BRAKES 43 P.D. LOCK WARNING 92 TRANSMISSION 44 ,RAKE SYSTEM WARNING 93 AXLE SHIFT 48 TACHOMETER 94 WHEELLOCK (ANTI SKID BRAKES) 50 LIGHT SWITCH 95 EXHAUST EMISSION MT-23714  CIRCUIT NUMBERS MAY REQUIRE SUFFIX LETTER IDENTIFICATIUN WHEREVER BRANCHES OF THE MAIN CIRCUIT ARE ENCOUNTERED. Circuit Numbers And Description (All Models) CTS-2794  Page 4 PRINTED IN UNITED STATES OF AMERICA