Find a 12V Fault Pack

Find a 12V Fault Pack

Test, don't guess. This 15-page printable pack gives you a six-step method for finding 12V faults with a multimeter, from describing the fault to the voltage-drop test that finds a poor connection. Clear line sketches throughout show each idea at a glance.

Inside:

- How a 12V circuit works, the way back to the battery, and shorts versus overloads

- The six steps: describe it, check the simple things, measure at the source and the load, voltage-drop test, fix one thing

- Earths and the negative side, where many strange faults live

- A worked example: a fridge cutting out in the back of a 4WD wagon

- Twelve fault finders, including dead lights and sockets, fuses that blow, voltage drops, hot wires and corrosion

- Practice tasks with answers

- A Fault Log for your own readings

Written for beginners working on 12V accessories in vehicles, campers and battery boxes, and for knowing when it's time to call an auto electrician.

PDF download, A4, made to print at home.

General information only. Not technically reviewed by a qualified electrical professional. Always follow your equipment manuals.