GMC Rally G3500 (1985-1996) speedometer/ odometer input wiring diagram

19 20 PNK WIRE 5 6 7 8 9 10 PNK PNK PNK PNK WIRE A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (ON REAR PORTION OF A/C COMPRESSOR) BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B MINI FUSE ENGINE COOLANT TEMPERATURE GAUGE SENSOR (TOP FRONT OF ENGINE) EVAP CANISTER PURGE VACUUM DIAGNOSTIC SWITCH (RIGHT SIDE OF ENGINE) FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY FUEL PUMP SWITCH, ENGINE OIL PRESSURE GAUGE SENSOR FUEL PUMP, SENDER (PUMP SHOWN) (IN FUEL TANK UNDER REAR OF VEHICLE) GAUGES FUSE 4 GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, START, OFF I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION INDICATOR LAMP (MIL) "SERVICE ENGINE SOON" MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP RIGHT SIDE OF ENGINE) MASS AIR FLOW SENSOR (PART OF AIR INTAKE DUCT, TOP FRONT OF ENGINE) OIL PRESSURE GAUGE INPUT ORG/ WIRE PNK PNK 1 2 3 4 5 6 7 8 9 10 11 WIRE PNK WIRE RED WIRE RED/BLK WIRE SPEEDOMETER/ ODOMETER INPUT TAN WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (TOP LEFT SIDE OF ENGINE) TRANS FUSE 20 UNDERHOOD FUSE-RELAY CENTER WHT WIRE YEL WIRE