G'day mate..
Wiring can be a tricky bugga sometimes.. I will try and give you the best easiest run down i can
Essential tools for testing Wiring circuits
-Multimeter
-Test Light
-Wire
-Elec Terminals
-Wire Strippers
Always check fuses first, as they are the weakest point in any wiring system as they are designed to be. most vehicles have 2 Fuse boxes, 1 inside vehicle and 1 in engine bay.
Having a repair manual with all of the vehicle specific wiring diagrams will be a major help and will save you alot of time working out systems. You should never test computer wiring with a test light as this can cause damage to the computer. Only ever use a multimeter (or an LED Test light).
An Altenator will charge at between 13.2v and 14.4v, check the charge rate at the battery and at the back of the Altenator if able to.
Everything in a vehicle must have a power and earth to operate so if something isn't working its generally lost one of these things, its your job to find out which one..
Is there anything specific your after of just abit of a general idea?
Fletcha
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