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Graco 15M974 XMix Key Switch Harness

The Graco 15M974 Harness, Key Switch ensures reliable on/off control for XM Plural‑Component Sprayers. Easy to install and OEM‑compatible.

  • OEM replacement part for Graco XM sprayers
  • Durable wiring for professional use
  • Keyed on/off switch for safety
  • Plug-and-play installation with control box

$46.4
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Compatible Machines

  • Graco XM Plural-Component Sprayers (e.g., XM-series mounted 2-component sprayers) :contentReference[oaicite:0]{index=0}
  • Graco XM PFP Plural-Component Sprayers :contentReference[oaicite:1]{index=1}

Product Overview

The Graco 15M974 Harness, Key Switch is a genuine OEM replacement part designed to act as the on/off control interface for Graco plural-component (XM) spray systems. It integrates directly with the sprayer’s control box and provides secure, reliable operation for professional use.

Key Features

Feature Description
OEM Part Factory-original Graco harness, ensures compatibility and reliability.
Key Switch Control Allows operator to turn the unit on/off with a keyed mechanism.
Plug-and-Play Integration Connects directly to Graco’s XM control circuit board — no major modifications needed. :contentReference[oaicite:2]{index=2}
Durable Wiring High-quality electrical harness designed to withstand jobsite conditions and repeated use. :contentReference[oaicite:3]{index=3}

Benefits & Advantages

  • Restores control functionality when the original key switch fails or becomes worn.
  • Ensures compatibility with Graco’s control module architectures.
  • Maintains safety: keyed switch reduces risk of unintended activation.
  • Easy to install — minimizes downtime when replacing faulty switches in the field.

Installation & Usage Tips

  1. Ensure the sprayer is powered off and pressure is relieved before starting installation.
  2. Remove the front control box shroud to access the display and key switch connectors. :contentReference[oaicite:4]{index=4}
  3. Disconnect the old harness and carefully plug in the new 15M974 Harness, Key Switch.
  4. Use a software token (if required) to reinitialize or synchronize the control module after replacement. :contentReference[oaicite:5]{index=5}
  5. Secure wiring, reassemble the shroud, and test the key switch functionality before resuming operation.

Technical Specifications

Part Number 15M974
Function Wired Key Switch Harness
Application Graco XM Plural-Component Sprayers control box :contentReference[oaicite:6]{index=6}

Frequently Asked Questions

This harness is compatible with Graco XM Plural-Component Sprayers, including various XM-series mounted units, as documented in Graco’s 313289 repair manual. :contentReference[oaicite:7]{index=7}

In some configurations, yes: Graco’s documentation suggests using a software token to re-initialize or synchronize the Fluid Control Module (FCM) when modules or harnesses are replaced. :contentReference[oaicite:8]{index=8}

The part number 15M974 refers to the harness assembly only. It does not include a key. For replacement keys, refer to your sprayer’s parts diagram or contact Graco support.

Yes — Graco’s XM Plural-Component Sprayers are often rated for professional, potentially hazardous use. Always refer to the specific model’s manual (e.g., 313289 series) to confirm the certification and compliance for your setup. :contentReference[oaicite:9]{index=9}

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