Its one of the relays with either a bad connection or on its way out.
There’s a cluster of them plugged into a board under the dash. Put your head on the floor & look up w a flashlight. Youll see them.
Set the car accessories so it buzzes then get under there and touch different relays. You’ll soon find the offender.
Why does everything go out at once. Working on 4 cruiser and the brake master cylinder in the Ram died yesterday.Replacing it now. My goodness to bench press the master in it took half an hour to get the air out. I have several column switches I will be pulling apart to see what’s wrong with them and try to get one working.I think the 1987 and fj62s use the same column switch.