WIRING DIAGRAMS
& TROUBLESHOOTING WORKFLOW

Teaches how to read and interpret wiring diagrams and schematics. Learn how to apply a structured diagnostic logic. Builds technician confidence in navigating documentation, using remote tools, and resolving faults efficiently.

From diagrams to diagnostic:
mastering troubleshooting logic

Audience: Intermediate-level techs responsible for diagnostics or system management
Level: Intermediate
Prerequisite: Module 1 (or basic electrical knowledge)
Duration: 2 hours
Location: At your facility, At the OEM plant, or online (webinar)
Course identification: Module #3

Key Takeaways

Participants will gain the ability to interpret Demers wiring diagrams with confidence and follow a structured troubleshooting method from symptom to root cause. They will understand how to use VisionPlex and related diagnostic tools to validate system logic, support remote assistance, and resolve issues more efficiently. This skillset dramatically improves diagnostic accuracy and reduces time spent isolating electrical faults.

An official Customer Care completion certificate will be delivered at the end of the session.

Curriculum

Wiring diagrams

Reading and interpreting Demers wiring diagrams
Locating and decoding wire colors, symbols, and circuit paths
Finding key reference points and legends in documentation

How to leverage Bluetooth diagnostic tool

Using VisionPlex App to verify logic
Viewing live states, inputs, and outputs
Requirements for remote diagnostic support

Troubleshoot case study (Scene Light)

Applying diagram tracing to a real component
Following signal path from switch to module to load
Isolating failures through logical steps

Requirement for remote diagnostic support

Information needed for OEM Customer Care remote support
Photos, VIN, module version, and symptom description
Connectivity and app prerequisites

Pair this course with additional modules

Module 1 - Electrical fundamentals for ambulance technicians

Power fundamentals: voltage, components and safe testing

Introduction to electrical theory and basic component behaviour used in ambulance systems. Builds technician confidence with essential concepts, safe tool handling, and 12V diagnostic practices.

Module 2 - Ambulance electrical system & multiplexing

Inside the system: How ambulance electrical architecture works

Deep exploration of ambulance electrical systems architecture, ECU locations, relay panels, and multiplex communication logic.

Module 3 - Wiring diagrams & troubleshooting workflow

From diagrams to diagnostic: mastering troubleshooting logic

Module 4 - Standard ambulance features: operation, logic & diagnostics

Everyday functions: mastering standard ambulance features

Understand universal features found on all ambulances, focusing on their operation, underlying logic, and diagnostic methods. Provides technicians with the knowledge needed to identify the root cause of everyday feature behaviours.

Module 5 - Core ambulance features: operation, logic & diagnostics

Core systems deep dive: essential functions logic explained

Develop advanced understanding of the core functions of an ambulance. Equips technicians with knowledge on how primary electrical and operational functions work, interact, and respond to conditions. Get field-proven methods to diagnose behaviours accurately, avoid guesswork, and ensure proper repairs.

Module 6 - Custom ambulance features: operation, logic & diagnostics

Beyond the standard build: how custom features integrates and operates

Explores optional and customer-specific ambulance features, explaining how each system operates, how its logic is structured, and what technicians must understand to diagnose performance or behaviour effectively.

Module 7 - Ambulance HVAC climate control: performance & diagnostics

Comfort under control: resolving ambulance HVAC issues

Covers the HVAC system: from fuses and sensors to airflow and fan troubleshooting. Equips technicians to esolve patient and crew comfort issues quickly.

Module 8 - Vehicle orientation for ambulance technician

First response ready: Orientation for New Technicians

Onboards new technicians with an extensive walkaroung, covering exterior and interior components, access points, wiring locations, and support pathways. Gives new technicians the confidence to navigate the vehicle, perform basic inspections, small adjustments,and understand where to start when issues arise.

Module 9 - Vehicle orientation for ambulance operators

First response ready: orientation for paramedics

A practical, operator-focused orientation designed to ensure paramedics and EMS staff are confident using the ambulance safely and effectively from day one. Covers vehicle layout, key systems, everyday features, and what to monitor and report during operations.

Module 10 - Ambulance features and functionalities orientation for operators

Behind the switches: practical systems orientation for operators

This module is designed for paramedics and operators who use ambulances daily. It covers all key operational functions, from front cab controls to care module features. Participants will learn how to use ambulance features confidently and efficiently.

Module 11 - Essential processes & support pathways for ambulance administrators

The Admin Toolbox: procedures, documentation & support contacts

Covers the processes, documentation, and contact points required when working with the manufacturer. Provides a structured overview of where to find information, how to order parts, manage warranty claims, and follow proper escalation pathways.

Module 12 - Behind the walls: the OEM plant experience

A glimpse inside: understanding the build to improve maintenance

An immersive guided tour of your ambulance manufacturing facility that reveals how ambulances are built from the inside out. Provides technicians with unique visibility on wiring routing, structure, chassis prep and final inspections to strengthen diagnostic reasoning and service awareness.

WIRING DIAGRAMS & TROUBLESHOOTING WORKFLOW