While working in shops I always struggled with electrical problems as did most of the mechanics back then. I became interested in electronics so I started taking a correspondence course from RCA in Radio and TV repair. I completed 10 or so lessons of 44 (which was basic electronics) I found that I was able to breeze through electrical problems on the cars I was working on at work.
Many of the problems I see from people who write in on the program "ALL Experts" are electrical problems and their main problem is that they don't know basic electronics. My few lessons from RCA does not give me enough electronics to teach the subject but I can give you what I have learned which should help you as it did me. So you will not be able to repair a radio nor your TV after reading this. BUT, you will be more able to repair your car with electrical problems. Thus keeping Lucas (Prince of Darkness) at bay.
Voltage = the amount of push of the current (potential) (measured in volts)
Amperage = the quantity of current going through a conductor (wire or anything) (measured in Amps)
Resistance = the resistance to flow of the current (a restriction) (measured in ohms)
Wattage = A measurement of work/horse power. (Amps x volts = Watts)
Load = Usually a light, motor, or anything that draws amperage.
Conductor = Anything that conducts electricity. The problem here is that if the voltage is high enough everything becomes a conductor, even nothing (a vacuum). However, a good conductor is a material that has loose electrons in it outer ring of it's atoms. The precious metals are the best Platinum, Gold, Silver etc.