1989 Dodge Dakota many electrical components suddenly inop

1989 Dodge Dakota 4 cyl Two Wheel Drive Manual 105k miles

Problem: Headlights inop, parking lights inop, no stop lights, no horn, key in ignition buzzer inop,
Instrument panel lights inop, license plate lights inop, headlight buzzer inop.

Starts fine, instrument gauges work, overhead light works, backup lights work, turn signals work, wipers work, hazard lights work, cigarette lighter works, radio works.
Attempted troubleshooting
By moving wiring & connectors under the hood, the head lights, horn, buzzer, etc worked several times, but would quit after a few minutes. Checked fuses & fuse links appear to be ok. Let truck sit overnight & problem still exists.
Disconnected several dirty connectors under hood & cleaned thoroughly, problem still exists. Can not get the lights, etc to work by moving wiring & connectors now.