Thank you, thank you, yk2immel!! I followed your instruction and found the switch!! It's a biatch to remove for sure, but i turned clockwise and finally got it out. I've already got a new one and promptly reinserted it back to the housing.

The BAS light on problem went away completely after the install. Yeepee!!

One quick question: I try to fully extend the plunger and then insert it, but the plunger seems to be depressed a bit when i plugged it into the housing. Is this normal?

Thanks again guys!!