I'm 55 and it took me at least 5-10 minutes to find the battery on my truck when I first got it! HA! I kept staring at the engine compartment, like a deer caught in headlights!
Here's my explanation about relays:
Understanding Relays And it doesn't hurt to know about fusible links, either:
Understanding Fusible Links I put Halogen replacements in my truck ... got 'em from my local auto parts store ... NOT expensive at all ... and wow! What a difference! See what I did
Here