An ohms meter checks circuits. You can get a cheap audible ohms meter. Just touch the leads and you get a beep. Remove a wire from each component you check to prevent the possibility of a false read/loop. You no get beep: part bad Kimosabe. Simple. Any part that don't make the thang beep is bad. Or use a cheap analog meter you can buy anywhere for 10 bucks: Click on pics to enlarge.