How To Check Car Wiring. How to get a car wiring diagram Find a car wiring diagram. Disconnect the wires at their corresponding components at both ends using a screwdriver.
Connect a jumper wire between one wire end and the car frame. Check for wires that have been pulled out and spliced with non weatherproof connectors. The other is to use a circuit tester touched to the wires to indicate whether wires are hot or not.
Checking a simple circuit is straightforward - the lighting circuits are among the simpler ones - but the electrical wiring in a car contains many interlinking and branching circuits which bring complications.
Disconnect the wires at their corresponding components at both ends using a screwdriver. Components you may disconnect. When dealing with electrical wiring of any kind its never safe to assume that the power is switched off. There are only two ways to ensure that electrical current is off to a set of wires.
