Oldsmobile/Buick Repair: check, light hook, theary

Question
hi, how are you? i have couple of questions regarding to auto electric.

how to check any electrical component if it's no good in your car. such as alternator, starter, wiper motor, etc. (and which equipment or meter to use in order to check any electrical in the car)
can you also please suggest any good websites where i can learn about auto electric and electric trouble shooting. thank you so much.


Answer
hi asif.well we normally use a 12 volt test light for just about everything simpler and just as effective.if you have 12 volts and ground the elec part will work or it is defective.but we also use a fluke meter or any elec tester to see just how much voltage is at a certain point.but a simple theary to remember is if you have 12 volts and ground the motor should be running.take a standard test light hook the clip to the neg side of your batt this will light up the test light when you touch a power wire.to check for ground same way except hook the clamp to the pos side of the batt.lot.s of sites to learn this info.please take a min to rate my help ty billymac