TradeRig: Industrial Systems Simulator

· ELECTRICAL

V 12V

100%

← Simulators

File

Save & Share Load from File…

Teaching

App

QUIZ MODE Find the fault · Steps: 0 ✓ FOUND!

Training Flow

Complaint → Inspect → Test → Measure → Diagnose → Explain → Repair

Complaint

Load a lesson or scenario from the Training dashboard.

Next Step

Pick an example or scenario, then press Run.

Objectives

Select a lesson to begin.

Guided Tasks

Diagnostic Session

Tests0

Readings0

Safety0

Score--

Final Diagnosis

No diagnosis submitted yet.

POWER

Battery

Ground

Fuse

Breaker

CONTROL

SPST

SPDT

Push-button

Ignition Sw

Relay

Timer

PASSIVE

Resistor

Pot/Dimmer

Capacitor

LOADS

Bulb

LED

Warning Light

Strobe

Motor

Solenoid

Solenoid Vlv

Horn

STARTING & CHARGING

Batt Disconnect

Starter Motor

Alternator

Engine

TOOLS

Diode

Junction

Test Point

Volt Gauge

Connector

MODULES

ECU

ECM

BCM

SENSORS

3-Wire

2-Wire

CKP

Speed

Temp

TRAILER

Plug / Socket

Junction Box

Tow Controls

21/5W Dual

Lamp Assy

Flasher

Frame Ground

Brake Magnet

DISTRIBUTION

Bus Bar

7-Pin Conn

Deutsch

CAN Bus

Start your Lab

Build from scratch or open a default example.

METER

Ohm's Law: Live

V (Volts)--

I (Amps)--

R (Ohms)--

V = I × R

Calculation Check

Total source--

Total current--

Equivalent R--

Power used--

Branch count--

Load a circuit and press RUN.

Battery bank: --

Select a component to inspect

⚠ Safety — always first

1. Connect BLACK (COM) lead first, then RED (VΩ)
2. Remove RED first when done, then COM
3. Never measure Ω on a live circuit — meter or component damage
4. Always have a fuse in the circuit before measuring current
5. Confirm the correct dial function before touching the circuit

Measuring voltage — V DC Dial → V DC · circuit ON

Source voltage: COM on battery (−), Red on battery (+) → reads full supply
At load: COM on chassis ground, Red on load B+ terminal → should equal battery voltage
Open circuit: full voltage before the break, 0V after — probe forward until voltage disappears
Bad ground: COM on a known-good ground, Red on the suspect ground → 0V = good, any reading = resistance

Voltage-drop test — the key diagnostic circuit ON · load running

What it finds: resistance in wires, connectors, and grounds — without disconnecting anything
How: COM on one side of the wire/connector, Red on the other → read the drop
Good: 0.00–0.10V across any wire or connector
Bad: > 0.10V = resistance present → corrosion, loose pin, damaged wire
Why it works: V = I × R — current already flowing through resistance shows as a measurable voltage

Measuring current — amps Dial → A · in SERIES

⚠ The meter goes IN SERIES — you must break the circuit.
How: circuit OFF, disconnect the wire at the load, COM to the load terminal, Red to the wire from B+, then turn ON
Reference at 12V: 21W bulb ≈ 1.8A · motor ≈ 2A · solenoid ≈ 0.8A · horn ≈ 1.5A
High draw: short downstream · Low draw: high-R or open in the circuit

Measuring resistance — Ω circuit MUST be OFF

⚠ Power OFF · disconnect one end of the component first.
OL / ∞: open circuit — broken wire, blown fuse, open switch, failed coil
0.00Ω: short — direct connection or shorted coil
Good wire: < 1Ω · Corroded connector: 2–5000Ω · Hi-R fault: 500–10000Ω
Components: bulb ≈ 12Ω · motor ≈ 6Ω · solenoid ≈ 15Ω · open coil = OL

Continuity test ♪ circuit OFF · quick check

Beep = connected: wire intact, switch closed, fuse good, ground connected
Silence = open: wire broken, switch open, blown fuse, lost ground
Quick ground test: one lead on chassis, the other on a component ground pin → beep = good

Systematic diagnostic — step by step

Step 1 Voltage at the battery terminals → 12.6V+ = good
Step 2 Voltage at the fuse output → same as battery = fuse good · 0V = fuse blown
Step 3 Voltage at the load B+ terminal → should equal battery voltage
Step 4 Ground at the load → COM on battery (−), Red on load ground pin → 0V = good
Step 5 Power present but not working → component failed → Ω test with power OFF
Step 6 Voltage lower than expected → voltage-drop each wire and connector
Rule: voltage present before the fault · none after · zero amps = open · excess amps = short

System Log

Tool: Select Parts: 0 Wires: 0 Current: 0.000A Pan: drag board · Zoom: scroll · Shift+scroll: pan · Fit: F · Help: ?

Training Flow

Complaint

Objectives

Guided Tasks

Diagnostic Session

Final Diagnosis

User And Progress

Active Path

Lesson Structure

Scenario Library

Shop Training Mode

Reports And Exports