Toyota prius 3rd gen windshield wiper swich assembly (L48)(L49)

Toyota Prius 3 ^rd Generation (XW30)

Windshield Wiper Swich Assembly Wiring Guide: DIY Pinout Diagram

What is: The vehicle windshield wiper switch assembly is a driver-operated control unit, usually mounted on the steering column, that manages front and rear wiper and washer functions. It sends electrical signals to the body control module or wiper relay to select intermittent, low, high, and mist wipe modes. Some assemblies also integrate washer pump activation and rain-sensing commands. By coordinating switch inputs with control electronics, it ensures clear windshield visibility, safe driving in rain, and proper timing, speed, and park positioning of the wiper motor operation.

Windshield Wiper Swich Assembly (84652-42130)

OEM Toyota 84652-42130 wiper switch assembly replacement part

Toyota Prius 3rd gen windshield wiper switch assembly 84652-42130 front view

Prius 3rd gen combination switch with wiper and washer controls

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1. Introduction

     The windshield wiper switch assembly (84652-42130) in the Toyota Prius is a multifunction steering column stalk designed to control the front and rear wiper and washer systems. It provides driver input for intermittent, low, and high-speed wiping, as well as mist and washer activation. The assembly communicates with the body ECU to regulate wiper motor speed, timing intervals, and park position. It also supports rain-sensing operation in models equipped with an automatic wiper system, allowing adaptive wiping based on rainfall intensity. The switch contains internal contacts and signal circuits that send precise voltage signals to the control module for reliable operation. Its ergonomic design ensures easy access without distracting the driver. This component plays a key role in maintaining clear windshield visibility, improving safety during rain or debris conditions, and supporting advanced driver assistance features that depend on an unobstructed forward view.

1. Related parts and Accessories
   • Body ECU (Main Body Control Module):-Receives switch signals and controls wiper operation logic, timing, and modes.
   • Windshield Wiper Motor & Linkage:-Executes low, high, and intermittent wiping based on ECU commands.
   • Front Wiper Relay / Integration Relay:-Switches power to the wiper motor according to control signals.
   • Washer Pump Motor:-Activated by the switch to spray washer fluid onto the windshield.
   • Rain Sensor (if equipped):-Detects rainfall and sends data to the ECU for automatic wiper control.
   • Combination Meter:-Displays wiper-related warnings or status when required.
   • Power Supply (AM1 / WIPER Fuse Circuits):-Provides protected electrical power to the switch and related components.

2. Windshield Wiper Swich Assembly Wiring Diagram & Pinout

A. Connector Location

• Windshield Wiper Swich Assembly Position: The Toyota Prius 3rd gen windshield wiper switch assembly is mounted on the steering column, behind the steering wheel, accessible by removing the upper and lower column covers.







• Connector Type:
  • L48 (10 pin) White housing
  • L49 (7 pin) White housing

B. Wiring Table

Toyota prius 3rd gen windshield wiper swich assembly (L48)(L49)

L48 TERMINALS OF windshield wiper swich assembly Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
L48-1	+S	(G) Green	➳ AL4 12 ➔ A35 3 (+S) [Windshield Wiper Motor Assembly]
L48-2	+B	(BR) Brown	➔ L87 5 ⟺ L87 4 ➳ 2A 11 ➤ [WIP] 30A Blade Fuse
L48-3	+1	(R) Red	➳ AL4 6 ➔ A35 1 (+1) [Windshield Wiper Motor Assembly]
L48-4	+2	(W) White	➔ L87 9 ⟺ L87 8 ➳ AL4 6 ➔ A35 4 (+2) [Windshield Wiper Motor Assembly ] ➔ L87 9 ⟺ L87 10 ➔ L103 1 ➤ [WIP NO.4] 10A Blade Fuse ➤ L103 3 ➔ L60 32 (WIP2) [Driving Supote ECU Assembly ]
L48-5	WR	(L) Blue	➔ L86 1 ⟺ L86 3 ➳ LR1 16 ➳ VR1 5 ➔ V9 1 (W) [Rear Wiper Motor Asembly] ➔ L86 1 ⟺ L86 2 ➳ AL4 13 ➔ A37 2 [Rear Washer Motor and Pump Assembly]
L48-6	_	_	_
L48-7	_	_	_
L48-8	_	_	_
L48-9	_	_	_
L48-10	_	_	_

L49 TERMINALS OF windshield wiper swich assembly Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
L49-1	_	_	_
L49-2	EW	(W-B) White/Black	➔ L92 11 ⟺ L92 7 ➔ ▼ L3 (Ground Point)
L49-3	WF	(B) Black	➔ L86 10 ⟺ L86 12 ➔ L103 3 ➤ [WIP NO.3] 10A Blade Fuse ➤ L103 4 ➔ L60 7 (WASH) [Driving Supote ECU Assembly ] ➔ L86 10 ⟺ L86 9 ➳ AL4 18 ➔ A36 2 [Windshield Washer Motor and Pump Assembly] ➔ L86 10 ⟺ L86 11 ➳ AL8 1 ➔ A44 5 (FRWA) [Headlight Cleaner Relay]
L49-4	_	_	_
L49-5	_	_	_
L49-6	C1R	(V) Velvet	➳ LR1 37 ➳ VR1 3 ➔ V9 2 (C1) [Rear Wiper Motor Asembly]
L49-7	+1R	(B) Black	➳ LR1 14 ➳ VR1 4 ➔ V9 3 (LS) [Rear Wiper Motor Asembly]