car won't start

just recently i was unplugging my speakers from my starter selonoid, and later that day after driving it a couple of times it would not start. My lights and radio work, but i was getting nothing from my engine not even a click from the starter. At first I thought I could have blown my starter selonoid when i was unplugging stuff so i replaced it and was still getting nothing, but it did brighten my lights. So i know i am getting power from my battery and i recently replaced my altenator, but i don't want to go and spend more money on something that isn't going to fix it. If anyone has any suggestion I would greatly appreciate the help

Sounds Iffy, but BAD GROUNDs will do all sorts of insane things to FORDS try cleaning and/or regrounding.