Turn signal signal switch grounding through steering shaft

[hunter1123]

I have a weird problem with my turn signal switch. (1970 k10)

I replaced the upper column bearing bc it had a bunch of play in it while I was in there I decided to change the turn signal switch as well since it was old and the plastic Was cracked all over the place.

After I put everything back together I hooked the battery back up and the negative terminal arches, a noise sort of a like switch turning on happens and the dome light turns on even though the door is shut.

I took it back apart and checked to see if I pinched a wire and the entire harness for the turn signal looks fine. When I go to put it back in the column when I touched the actual steering shaft it arched again and it appears to bring grounding through the bearing when installed.

If I unplug the turn signal switch harness (the half moon shaped one) the arching stops and the dome light switch works properly. When’s it’s plugged in it arches, draws power from the battery when the truck is off and the dome light stays on regardless of whether or not a push the door switch.

Does anyone have any clue what this is? Is the turn signal switch bad ?

Thank you