How To Fix Automotive Electrical Problems
Tuesday, April 1st, 2008One of the hardest do it yourself auto repair tasks is solving automotive electrical problems on your own. To be successful you will need a wiring diagram in most cases. But even when you have this electrical diagram in your hand it can still be hard to understand and diagnose circuit malfunctions.
When you are tracing electrical circuits using a standard automotive wiring diagram you always want to work from the load or component back to the battery. Find the load device first, for example: light, horn, solenoid or actuator, then find its ground, and then find the battery on the diagram.
Trying to read a schematic from positive battery voltage to negative or ground does not work well. Always work from your load back toward the battery. This rule is important because it gives you a standard and correct direction of diagnosis. If you have proper power and grounds to your load component then you have just solved your problem on the first diagnostic test indicating that the failure is in the (more…)
