I have a 1987 ford ranger 2.3l and it has no power to anything. The starter would just click then the truck will not have any power to the dome light, starter, fuel pump, headlights nothing. But then the power would come back then go again and now the power hasn't come back since. I need help I'm lost.

 

I'd first check battery ground, engine ground, and body grounds. Just clean them to show fresh metal and then re-attach.