Electrical Component Locator — Toyota 4Runner II (1987-1995)

BUZZERS, RELAYS & TIMERS

Component		Location
A/C Cut-Off Relay		On evaporator case.
Anti-Lock Brake Solenoid Relay		In right rear corner of engine compartment.
Antenna Relay		Behind upper left side of dash. (Scheme 1)
Back Door Power Door/Window & Wiper Relay (4Runner)		Behind left rear trim panel. (Scheme 2)
Back-Up Relay (Pickup)		On fuse/relay block No. 1. (Scheme 3)
Clutch/Starter Relay		On fuse/relay block No. 1.
Rear Window Defogger Relay (4Runner)		In fuse/relay block No. 2. (Scheme 3)
EFI Circuit Opening Relay		Behind right side of dash, above ECU. (Scheme 4)& (Scheme 5).
EFI Main Relay		In fuse/relay block No. 2. (Scheme 4)& (Scheme 5).
Headlight Relay		In fuse/relay block No. 2. (Scheme 4)
Heater Relay
Front (Pickup & 4Runner)		In fuse/relay block No. 3. (Scheme 6)
Rear (4Runner)		In fuse/relay block No. 3. (Scheme 6)
Integration Relay		Behind left kick panel. (Scheme 7)
Light Reminder Relay		Under center of dash. (Scheme 7)
Main Relay		Behind left kick panel. (Scheme 8)
Moon Roof Relay (4Runner)		In fuse/relay block No. 1. (Scheme 3)
Power Door/Window Relay (Pickup)		In fuse/relay block No. 1. (Scheme 3)
Starter Relay		In fuse/relay block No. 1. (Scheme 3)
Taillight Control Relay		In fuse/relay block No. 1. (Scheme 3)& (Scheme 7).
Turn Signal/Flasher Relay		Behind left side of dash, near steering column.
Wiper Relay (4Runner)		Under right side of dash.

BUZZERS, RELAYS & TIMERS LOCATION

Component		Location
Circuit Breakers (4Runner)
Heater		In fuse/relay block No. 3. (Scheme 6)
Power Door/Window Lock		In fuse/relay block No. 1. (Scheme 3)
Fuse/Relay Block No. 1		Under left side of dash. (Scheme 3)& (Scheme 9).
Fuse/Relay Block No. 2		On front right corner of engine compartment. (Scheme 9)
Fuse/Relay Block No. 3		Behind glove box. (Scheme 6)& (Scheme 9).
Fuse/Relay Block No. 4		Next to fuse relay block No. 2. (Scheme 9)
Fusible Links		On fuse/relay block No. 2.
Main Fusible Link		On positive battery cable. (Scheme 9)

CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Anti-Lock Brake Control Unit	Behind dash, above glove box.
Cruise Control Computer	Behind left kick panel. (Scheme 8)
ECT Control Unit	Behind right front kick panel. (Scheme 10)
Electronic Control Unit (ECU)	Behind right kick panel. (Scheme 4)& (Scheme 5).
Shift Lock Control Unit	Under shift lever console. (Scheme 11)

CONTROL UNITS LOCATION

Component		Location
A/C Thermistor		In evaporator case.
Airflow Meter		In front of air cleaner assembly.
Coolant Temperature Sensor (CTS)
4-Cylinder		On right side of engine, in coolant outlet flange. (Scheme 4)
V6		In coolant passage at rear of intake manifold. (Scheme 5)& (Scheme 10).
Deceleration Sensor		Behind center of dash.
Evaporator Temperature Sensor		On top of evaporator housing.
Exhaust Gas (EGR) Temperature Sensor
4-Cylinder		Near EGR valve. (Scheme 4)
V6		Near EGR valve. (Scheme 5)
Fuel Gauge Sending Unit		In fuel tank.
Knock Sensor		Under Intake Runner.
Oil Pressure Sending Unit		On left lower front side of engine block.
Oxygen Sensor
4-Cylinder		In exhaust manifold.
V6		In exhaust pipe, near catalytic converter. (Scheme 5)
Speed Sensors
No. 1		On back of speedometer. (Scheme 10)
No. 2		On left rear of transmission. (Scheme 10)
No. 3		On top of rear differential.
Throttle Position Sensor		On side of throttle body. (Scheme 10)
Transmission Fluid Temperature Sensor
No. 1		On right front of transmission case. (Scheme 10)
No. 2		On right rear of transmission case. (Scheme 10)

SENDING UNITS & SENSORS LOCATION

Component	Location
Cruise Control Vacuum Pump	Under cruise control actuator.
Fuel Pump Motor	In fuel tank.
Power Window Motor	In left side of tailgate. (Scheme 2)

MOTORS LOCATION

Component	Location
Cold Start Injector	On intake chamber.
Ignition Key Interlock Solenoid	Behind ignition switch. (Scheme 11)
Lock-Up Solenoid (A/T)	In transmission valve body. (Scheme 10)
Shift Solenoids (A/T) No. 1, 2 & 4	In transmission valve body. (Scheme 10)
Shift Lock Solenoids (A/T)	Under center console, by shift lever. (Scheme 11)

SOLENOIDS & SOLENOID VALVES LOCATION

Component		Location
A/C Dual Pressure Switch		On evaporator case.
Back Door (4Runner)
Control Switch		In tailgate. (Scheme 2)
Lock Detection Switches (2)		In tailgate. (Scheme 2)
Power Door Window Switch		In center console. (Scheme 2)
Rear Window Limit Switch		In left side of tailgate. (Scheme 2)
Rear Window Lock Switch		In center console. (Scheme 2)
Unlock Warning Switch		In tailgate. (Scheme 2)
Back-Up Light Switch		On right side of transmission.
Brake Fluid Level Warning Switch		Inside brake master cylinder.
Clutch Switch		On bracket, above clutch pedal. (Scheme 8)
Cold Start Injector Time Switch
4-Cyl.		On right side of engine block, in coolant passage. (Scheme 4)
V6		In coolant passage, at rear of intake manifold. (Scheme 5)
Hazard Warning Switch		In upper right side of instrument panel. (Scheme 7)
Neutral Start Switch (A/T)		On right side of transmission. (Scheme 8)& (Scheme 10).
Oil Pressure Switch		On left front side of engine block.
Overdrive (O/D) Main Switch		On shifter assembly. (Scheme 10)
Parking Brake Switch		At rear of brake lever mounting bracket. (Scheme 8)
Seat Belt Switch		On driver's side buckle.
Stoplight Switch		On bracket, above brake pedal. (Scheme 8), (Scheme 10) & (Scheme 11).
Transmission Shift Position Switch		Under shift selector console.
Transfer Case Shift Position Switch		On right side of transfer case. (Scheme 5)

SWITCHES LOCATION

Component	Location
A/C Amplifier	On evaporator housing.
A/C-Heater Blower Motor Resistor	On left side of blower housing.
Diagnostic Connector	Behind fuse/relay block No. 2. (Scheme 5)