My car is showing an electrical problem (I suspect it is electrical). As an intermediate DIY what should be the first things I check, and how easy is it to check them?
I'm thinking of Fuses, Relays, battery, alternator, etc.
I understand that cars have fuse boxes, I also vaguely understand that a fuse can be blown and that I can visually inspect it.
I understand that cars have relays but I don't understand what they do and how to know if there is one bad one that is causing the problem. and how to fix them.
Should I disconnect the battery when checking for this? How to disconnect the battery?
How to test if the battery is working fine? and an alternator?
I know this is a general question.. But I strongly feel these types of questions are extremely useful for novices like me. Would be great if i could understand what are the most common types of electrical failures and what to check first.