Q about GM headlight switch
 

I have wired my hot rod - first wiring job ever - and there are a few bugs to sort out:

Rear lights/park/instrument lights are not working. I suspect the GM swich. It is from an early 80's Cadillac. It's a typical Gm switch, but the spade poles doesn't stay in the usual pattern, and when I tested the switch prior to mounting, I got power only on the headlight pole.

Wipers and wiper washer doesn't work. I continued an old thread about that.
I want to make the column switch to work together with the universal wiper motor.

Very grateful for any suggestions.