MicroTrainer Common Electrical Faults

Pack of 1

$60.00

MicroTrainer Common Electrical Faults

$60.00

4 left

Four Lighting Circuits, Ten Real Faults, One Multimeter

Every circuit on this board is a real circuit, and every fault is a real fault. Nothing is simulated in software. Flip a switch and a genuine open, short, or high resistance appears in the wiring, and the student finds it the way they would on a vehicle: with a meter, working from symptoms to a location.

What It Does

Four identical lighting circuits sit side by side. Ten switches inject faults into them, one at a time. Because the circuits are identical, three healthy ones are always available as the known-good reference, which is the comparison a technician actually makes in the bay and the one that is hardest to set up in a classroom.

Key Features

Ten fault injection switches - open circuit, short to ground, short to V+ and high resistance, distributed across the four lighting circuits, plus two faults in the power distribution itself so a dead board is not automatically a dead circuit
Red jumpers as connectors - ten points where the harness comes apart. A short to ground is hard to teach because the moment the fuse opens there is nothing left to measure. These let a student do what they would do on a vehicle: disconnect one section at a time to isolate the fault
Self-resetting electronic fuse - it latches off on a short to ground exactly like a real circuit protection device, and clearing the short does not bring it back on its own. Pull the right jumper, press RESET, and the board tells you whether you guessed right
Wire designations on the silkscreen - every section of wire between connectors is named the way a service manual names it: A1 supply to fuse, F1 fuse to switch, L1 through L12 the lighting feeds, Z1 through Z8 the grounds. A fault then has one correct written answer
Test pads throughout - large pads sized for multimeter probe tips, on both sides of every component, so a voltage drop can be walked down a circuit section by section
Fault reference on the back - all four fault families with their symptoms, printed on the board itself, so the answer key travels with it
Self-powered and pocket sized - no bench supply, no vehicle, no shop. Fits in a tool bag or a classroom kit

The Four Fault Families

Fault	What the student sees	How it is found
Open circuit	Load dead, fuse intact	Voltage on the source side of the break and nothing on the other
Short to ground	Fuse opens, everything on it goes dark at once	Isolation. Disconnect sections until the fuse holds
Short to V+	Load operates with the switch off	Turn the control off and see what stays on
High resistance	Load dim or slow, never dead	Voltage drop across each section, looking for the one that is too big

Designed For

Automotive and aviation maintenance training programs
Trade schools and community college electronics courses
Self-study for ASE, A&P, or military MOS certification prep

Free Interactive Fault Simulator

A browser-based simulator that mirrors this board, with a working multimeter. Free, no account, nothing to install.

Meet each of the four faults on a single circuit first, with the current animated so you can see where it goes and where it stops
Learn the connectors and the measurement procedure step by step, with the meter leads shown on every reading
Then work the full board: inject any fault, pull any connector, probe any test pad, and reset the eFuse

Open the Fault Simulator in your browser