B HOW TO USE THIS MANUAL The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also be checked this way.
I GROUND POINT FAN MAIN RELAY 5 CIGARETTE LIGHTER HEATER CONTROL ASSEMBLY FAN MAIN RELAY 5 E 3 O/D MAIN SW A I 6 HEATER SERVO MOTOR AMPLIFIER A/C FAN RELAY NO.2 5 E 3 CLOCK A I 6 BLOWER SW A/C FAN RELAY NO.3 5 E 3 J 1 PARKING BRAKE SW RADIATOR FAN MOTOR E 3 JUNCTION CONNECTOR 7 RETRACT CONTROL RELAY E 2 3B COMBINATION METER RETRACT MOTOR RH E 4 HORN SW [COMB. SW] RETRACT MOTOR LH E 5 3C 7 I 2 DIMMER SW [COMB.
SW] FRONT TURN SIGNAL LIGHT RH E 4 E 4 FRONT SIDE MARKER LIGHT R H 3D 1 CRUISE CONTROL MIRROR SW PARKING LIGHT RH E 5 FRONT SIDE MARKER LIGHT LH 3F 3 REMOTE CONTROL MIRROR SW FRONT TURN SIGNAL LIGHT LH E 6 E 4 BRAKE FLUID LEVEL WARNING SW 3G 13 TURN SIGNAL FLASHER PARKING LIGHT LH 3E 5 I 2 REAR WINDOW DEFOGGER SW DOOR LOCK CONTROL SW RH B 4 IA1 2 I 4 3E 6 I 2 LIGHT CONTROL SW [COMB. SW] DOOR KEY LOCK SW RH B 4 I 5 WIPER AND WASHER SW [COMB.
SW] DOOR LOCK MOTOR RH B 4 EA2 10 I 5 UNLOCK WARNING SW DOOR LOCK CONTROL RELAY B 5 I 5 ID1 15 POWER WINDOW MASTER SW EA B 5 POWER WINDOW CONTROL RELAY BLOWER RESISTOR B 5 DOOR KEY LOCK SW LH ELECTRICAL IDLE−UP CUT RELAY (M/T) I 4 I 8 IB1 8 B 5 DOOR LOCK CONTROL SW A/C AMPLIFIER DOOR LOCK MOTOR LH I 5 (4A–GZE) FUEL CONTROL SW RADIO AND PLAYER BR 4 4 4 4 I 5 IC3 3 WOOFER AMPLIFIER HEATER RELAY 4 BR COMBINATION METER AUTO ANTENNA MOTOR BR BR 4 BA1 5 BR BR BR I 3 I 3 BR COMBINATION METER 4 FUEL SENDER IB IC The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. 2002 LEXUS LX 470 (EWD455U) 8 W–B A