Shift interlock circuit, motor home chassis for Chevrolet Forward Control P30 (1985-1999)

85 30 PPL BLK WIRE BRAKE/ BRAKE/TRANSMISSION SHIFT INTERLOCK (BTSI) SOLENOID (ON STEERING COLUMN) BRN WIRE DIESEL DK GRN/WHT WIRE GASOLINE HOT IN RUN I-3 FUSE I/P FUSE BLOCK PARK/ NEUTRAL POSITION SWITCH RELAY PARK/NEUTRAL POSITION, BACKUP LAMP SWITCH (LEFT OF TRANS) POWER- TRAIN CONTROL MODULE (LEFT OF DRIVER'S ISLAND) PPL TORQUE CONVERTER CLUTCH, STOP LAMPS SWITCH (REAR OF BRAKE SUPPORT BRACKET) TURN-B/U FUSE VEHICLE CONTROL MODULE (TOP OF RADIATOR SUPPORT) IGN YEL WIRE