CHASSlS ELECTRICAL SYSTEM 2 480 HARNESS ASSY CABLE ASSY CIRCUIT EXTENSION SOCKET WIRE Chassis Wiring Segmented NOTE 1 When using on 1950 thru 1952 models it may be necessary to splice additional No 12 gauge A wire to ammeter connection and additional No 18 gauge wire to horn button connection NOTE 2 When using on 1957 models it may be necessary to splice 1 wire from connector to voltage regulator and to replace terminal and connector on horn wire NOTE 4 When using 1964 harness in place of 1963 harness transfer the light switch connector from Q 1963 harness NOTE 5 lt may be necessary to cut off and tape resistor shunt wire at relay horn and resistor location NOTE 6 lt may be necessary to coil and tape excess wire NOTE 7 lt may be necessary to tape back unused pulse amp conn 55 62 All 2980868 1 AC gen jumper wire cover 51 l 0 L 57 59 Ser 4 6 8 10 exc Air Brake 57 Ser 5 7 9 58 59 Ser 5 7 9 exc Ser 9 w Air Brake 2970005 1 cover 70 0 L Note 2 l 61 All w dir sig exc FFC Tilt 2976984 1 cover 1 18 O L w junction block 62 All exc FFC SBC Tilt 2980916 1 if w junction block cover 67 u 0 L 63 LCF Diesel 64 65 LCF 6V 53 exc jumper cable 2985615 1 instrument panel Note 4 63 Ser 80 exc Tilt Diesel 63 Ser 60 w H D wiring exc FFC Tilt SBC 2983599 1 cover 67 O L w junction block 63 Ser 50 60 exc FFC Tilt 2983604 1 cover 62 z O L w junction block 63 Ser 60 FFC w H D wiring 64 66 Ser 50 60 FFC 2985522 1 instrument panel Note 4 63 66 All exc Tilt 130 amp Diesel 2985552 1 gen and forward lamp 64 66 All exc FFC Tilt D DH478 65 66 Ser 60 TDM D DH478 2985502 1 instrument cluster 64 65 All exc FFC Tilt Diesel 2986741 1 instrument panel 65 Ser 60 80 8 cyl exc Tilt SBC FFC jumper cable 2988191 1 instrument panel 65 Ser 60 TDM D DH478 2988878 1 gen and forward lamp 65 Tilt 4 53 D351 exc jumper cable 2988999 1 instrument panel 65 66 All Batt gauge w H D Wiring 0351 D DH478 exc Tilt 2982625 1 volt meter to body harness 65 66 Tilt Batt gauge w H D Wiring V D DH478 2982626 1 volt meter to body harness 65 66 Ser 60 80 Tilt 4 cyc Diesel w Batt gauge exc H D Wiring 2983908 1 voltmeter to inst panel 65 Ser 60 LCF w H D Wiring D DH478 exc Air Equip 65 Ser 80 LCF w H D Wiring D DH478 Q 2988224 1 instr panel 65 66 Ser 60 80 D DH478 exc Tilt TDM H D Wiring 2988281 1 instr panel 65 66 Tilt D DH478 exc H D Wiring 2988911 1 instr panel 65 66 Tilt w H D Wiring D DH478 2988222 1 instrument panel 65 66 All w H D Wiring D DH478 exc Tilt TDM 2988282 1 fuel tank 65 66 All D351 exc Tilt 2985729 1 front end extension 65 66 All D DH478 exc LCF TDM Tilt H D Wiring 2985730 1 front end extension 65 Ser 60 LCF w A O H B D DH478 exc H D Wiring 65 Ser 80 LCF D DH478 exc H D Wiring 2985742 1 front end extension 65 66 All w Hyd Air Brake D DH478 exc Tilt TDM 8904414 1 trailer conn plug 65 66 Tilt w Hyd Air Brake D DH478 i 70 72 Tilt w trailer jumper cable 2974645 1 trailer conn plug 66 Ser 80 exc Tilt Trailer jumper cable 66 Ser 60 327 366 exc FFC Tilt 6290005 1 instrument panel 67 68 All Cab exc Tilt Diesel V 69 All Cab exc Tilt Diesel Trailer jumper cable 70 Ser 60 Cab exc Air Equip Tilt trailer jumper cable 70 Ser 50 Conv w Air Brakes 1 i GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM 2 480 2 480 2 42 REV 5 79 I