The Acura TL 1999-2003 is a luxurious mid-sized sedan manufactured by Honda under its Acura brand. It is a well-designed car with many advanced features and reliable performance. However, like any other vehicle, it is essential to keep its electrical system in top condition to prevent unexpected malfunctions. The electrical system of the Acura TL 1999-2003 comprises various components, including the fuse box, relays, and other electrical parts. In this article, we will take a closer look at the fuse box and relay of the Acura TL 1999-2003, discussing their functions and providing helpful tips to keep them in good working condition.

MUST READ: DYI – How to Check Car Fuses?

(1999-2003) Acura TL fuse box and relay with Diagram

Passenger compartment fuse box

acura tl 1999 2003 dashboard
acura tl 1999 2003 dashboard
  1. Fuse Box No.1
  2. Driver’s Multiplex Control Unit 
  3. Moon Roof Close Relay
  4. Moon Roof Open Relay
  5. PGM-FI Main Relay
  6. Cruise Control Unit
  7. Daytime Running Light Control Unit
  8. Supplemental Restraint System (SRS) Unit

Passenger Compartment Fuse Box No.1

acura tl 1999 2003 passenger compartment
acura tl 1999 2003 passenger compartment
No.AmpsAssignment/Designation
115APGM-FI Main Relay, Supplemental Restraint System (SRS) Unit
210ASupplemental Restraint System (SRS) Unit
37.5AHVAC, Radiator Fan Control Module, Rear Window Defogger Relay, Fan Control Relay (Type S)
47.5AABS-TCS Control Unit, (except Type S), Power Mirror Defoggers, Power Mirrors, Option Connector S, Seat Heater Relay, VSA Control Unit (Type S)
57.5ADaytime Running Lights (DRL) Control Unit
615ACharging System, Cruise Control, Electrical Load Detector (ELD) Unit, Engine Mount Control System, Evaporative Emission Control System, PCM (VBSOL), Primary and Secondary Heated Oxygen Sensor (HO2S), Radiator Fan Control Module, VSP Sensor (’99 with Navigation), Cruise Control/TCS Switch (except Type S) or Cruise Control/VSA Off Switch (Type S) Indicator Light, Intake Manifold Runner Control (IMRC) Module (Type S), VSA Control Unit (Type S)
77.5AOccupant Position Detection System (OPDS) Unit (’00-’02), Shift Lock Relay (’99), Wiper/Washer (’99)
87.5AAccessory Power Socket Relay, Navigation System, Option Connector R, Shift Lock Solenoid
97.5AAutomatic Dimming Inside Mirror, Brake Light Failure Sensor, Clock (without Navigation), Driver’s and Passenger’s Multiplex Control Units, Daytime Running Lights (DRL) Indicator, Gauge Assembly, Reverse Relay, Shift Lock Relay (’00-’02)
107.5ATurn Signal/Hazard Relay
1115AIgnition Coils
1230AWiper/Washer
137.5AStarter Signal, PGM-FI Main Relay, Powertrain Control Module (PCM)
acura tl 1999 2003 passenger compartment relay
acura tl 1999 2003 passenger compartment relay
No.Relay
R1Starter Cut
R2Reverse
R3Turn Signal/Hazard
acura tl 1999 2003 dashboard 2
acura tl 1999 2003 dashboard 2
  1. BOSE Equalizer Unit
  2. Powertrain Control Module (PCM)
  3. Fuse Box No.2
  4. Navigation Relay
    High Beam Cut Relay (with Daytime Running Light (1999-2001))
  5. 2002-2003: Navigation Relay
    1999-2001: Taillight Relay
  6. ABS/TCS Control Unit

Passenger Compartment Fuse Box No.2

acura tl 1999 2003 passenger compartment 2
acura tl 1999 2003 passenger compartment 2
No.AmpsAssignment/Designation
130A1999-2001: Moonroof Close and Open Relays
20A2002-2003: Power Window Control Unit (Driver’s Power Window)
220A1999-2001: Driver’s Power Seat Adjustment Switch (Reclining)
20A2002-2003: Power Seat Control Unit (Reclining)
320ASeat Heater Relay
420A1999-2001: Driver’s Power Seat Adjustment Switch (Slide)
20A2002-2003: Power Seat Control Unit (Slide)
520AFront Passenger’s Power Seat Adjustment Switch (Slide), Passenger’s Multiplex Control Unit
620AFront Passenger’s Power Seat Adjustment Switch(Reclining)
720ALeft Rear Power Window Switch, Door Multiplex Control Unit (’02-03), Moonroof Close And Open Relays, Power Window Control Unit (’02-’03)
820AFront Passenger’s Power Window Switch
920AAccessory Power Socket Relay, Audio Unit, Front Accessory Power Socket, Rear Accessory Power Socket, Stereo Amplifier
1010ADaytime Running Lights (DRL) Control Unit, Navigation Display Unit, Navigation Relay (’99), Navigation Unit
117.5ACeiling Light, Driver’s and Front Passenger’s Door Courtesy Light, Passenger’s Multiplex Control Unit, Trunk Lid Opener Maint, Power Seat Control Unit (’02-2003), Spotlights, Trunk Light
1220AClimate Control Unit, Clock (except Navigation), Driver’s, Door, and Passenger’s Multiplex Control Unit, Driving Position Memory Switch (’02-’03), Gauge Assembly, Keyless Receiver Unit (’02-03), PCM (VBU), Radiator Fan Control Module (2002-’03), Security Indicator
137.5Aexcept for Type S: ABS-TCS Control Unit
147.5Aexcept Type S: ABS-TCS Control Unit
7.5AType S: A/C Compressor
1520A1999-2001: Door Multiplex Control Unit (Driver’s Power Window)
30A2002-2003: Moonroof Close and Open Relays
16Power Door Lock, Passenger’s Multiplex Control Unit, Trunk Lid Opener MainRight Rear Power Window Switch
acura tl 1999 2003 passenger compartment relay 2
acura tl 1999 2003 passenger compartment relay 2
No.Relay
R1Power Window
R2Accessory Socket
R3Rear Window Defogger

Engine Compartment

acura tl 1999 2003 engine compartment
acura tl 1999 2003 engine compartment
  1. Relay Box No.1
  2. Fuse Box
  3. Relay Box No.2
  4. Intermittent Wiper Relay
  5. Relay Box No.3

Engine Compartment Fuse Box

acura tl 1999 2003 engine compartment fuse box
acura tl 1999 2003 engine compartment fuse box
No.AmpsAssignment/Designation
41120AAlternator, Battery, Power Distribution
4260AIgnition Switch (BAT)
4320ARight Headlight, Daytime Running Lights (DRL) Control Unit
44– –
4520ALeft Headlight, Combination Light Switch (’02-’03), Daytime Running Lights (DRL) Control Unit, DRL Diode, Gauge Assembly, High Beam Cut Relay (DRL)
4615AData Link Connector (DLC), PGM-FI Main Relay
4720ABrake Pedal Position Switch, Horn Relay, Ignition Key Switch/Key Light, Security Horn Relay (’99)
4820AABS Fail-Safe Relay (’99-’01), TCS Relay (except Type S) (’02-’03), VSA Relay (Type S) (’02-’03)
4915AHazard Warning Switch
5030A1999-2001: ABS Pump Motor Relay
20AType S: VSA Throttle Motor Relay
5140APower Window Motor , Power Window Relay
5220A1999-2001: TCS Fail-Safe Relay
20A2002-2003: Fog Light Relay
5340ARear Window Defogger Relay
5440AFuse (Passenger Compartment Fuse Box No.2): No. 9, 10, 11, 12, 13
5540AFuse (Passenger Compartment Fuse Box No.1): No. 2, 3, 4, 5, 6
5640ABlower Motor Relay
5720Aexcept Type S: Radiator Fan Relay
30AType S: Radiator Fan Relay
5820Aexcept Type S: A/C Compressor Clutch Relay, Condenser Fan Relay, Radiator Fan Control Module (’99-’01)
30AType S: A/C Compressor Clutch Relay, Condenser Fan Relay, Radiator Fan Control Module (’99-’01)
5915ATaillight Relay
•– –
Relay
R1Headlight No. 1
R2Headlight No. 2
R3Horn
R4A/C Condenser Fan
R5Blower Motor
R6Radiator Fan
R7A/C Compressor Clutch

Engine Compartment Relay Box No.1 (1999-2001)

acura tl 1999 2001 engine compartment relay box 1
acura tl 1999 2001 engine compartment relay box 1
No.Relay
R1ABS Pump Motor
R2ABS/TCS Fail-Safe
R3TCS

Engine Compartment Relay Box No.2

acura tl 1999 2003 engine compartment relay box 2
acura tl 1999 2003 engine compartment relay box 2
No.Relay
R1Shift Lock
R22002-2003: Taillight
R32002-2003: Seat Heater
1999-2001: Security Horn
R42002-2003: High Beam Cut Relay (Daytime Running Light)
1999-2001: Seat Heater

Engine Compartment Relay Box No.3 (2002-2003)

acura tl 2002 2003 engine compartment relay box 3
acura tl 2002 2003 engine compartment relay box 3
No.AmpsAssignment/Designation
140AABS Motor
220AABS F/S
37.5AABS Motor Check
Relay
R1ABS Pump Motor

In conclusion, the Acura TL 1999-2003 is a reliable car that offers great performance and comfort. Understanding the fuse box and relay system can help in identifying and solving electrical issues. It is essential to follow the manufacturer’s guidelines for maintaining the car’s electrical system to ensure a safe and smooth driving experience. With the help of the diagrams provided, troubleshooting and repairing the fuse box and relay system can be made easier for Acura TL owners.

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