4WD won’t engage. 4hi blinking

I’m old and brand new to any forum. I have a 2013 Tundra 4xr TRD with 196K. Bought from a friend about 2 yrs ago. 4WD initially worked well. Driven minimally since.

Now 4WD won’t engage either high or low. 4hi blinking and VSC light is on.
I checked the high and low actuators. They appeared in new condition. Each actuator motor ran with a jumper lead.

I was able to clear the 4hi and VSC lights…I don’t remember what worked. They lit up again when I tried to unsuccessfully engage 4WD at a much later date.

I’ve tried unsuccessfully to clear the 4hi and VSC lights again. Including:
Battery disconnect plus jumping + and - leads together for 15 minutes;
Turning key to on x 10 sec then off x 3 cycles;
Turning key to on x 3 cycles in 10 seconds;
Disconnecting Ground lead and tapping + lead x 3 in 10 seconds.
My cheap OBD2 scanner shows no codes.

ANY IDEAS on how to clear the lights or how to test the actuator electrical connectors to see if power is getting to the actuators?

I appreciate any help.
Thanks, David