88 s-10 wont crank

I have a 88 s-10 that wont turn engine over. Starter does'nt engauge.
2.8 engine, standard trans.,
Headlights work, horn works, but no gauges or heater blower, radio,no engine crank.
I can jump starter solinoid & it will crank.
Any help would be appreciated.

3 possible answers.

Starter solinoid
wire from the ignition switch.


But MOST likely considering everything else that doesn't work
IGNITION SWITCH.
why are you testing us? You must have known the answer