Q21-1136-001-002 Genuine Paccar Master Switch Control Module

Product Overview

The Q21-1136-001-002 is a genuine Paccar master switch control module specified for Kenworth T880 and Peterbilt 579 truck electrical systems, with a 2024 Kenworth T880 identified in the supplied take-off information. This electronic unit provides centralized management of electrical control signals for assigned vehicle functions, allowing connected switches and control circuits to communicate operating requests within the truck's electrical architecture.

Product Features

The Q21-1136-001-002 Paccar master switch control module handles electrical commands from the designated switch interfaces and distributes control information to associated vehicle systems.

• Receives driver-initiated commands from connected switches within the cab electrical network
• Routes control signals toward the corresponding vehicle circuits and electronic equipment
• Consolidates multiple switching functions through a centralized electronic control interface
• Interprets assigned switch inputs according to the installed truck electrical configuration
• Supports communication between cab control devices and their associated electrical systems
• Requires matching module connections and control assignments for proper circuit operation

General Specifications

Installation Notes

The Q21-1136-001-002 should be installed after identifying the original master switch controller location, inspecting the electrical connectors for damaged terminals or corrosion, and confirming that the module's connection arrangement matches the existing cab wiring system. Following installation, check the operation of the connected switches, verify communication with the associated vehicle circuits, and perform any required electronic configuration or diagnostic procedures according to the applicable Paccar service instructions.

Always verify the original module part number, Kenworth or Peterbilt electrical configuration, connector arrangement, assigned switch functions, and any required programming before installation.