When we become believers and are sealed with God’s Spirit …is our conscience used by His Spirit to lead us and correct us?
I think that’s a good way of describing it. I believe what we call our conscience was the original link between our spirit and the Spirit of God. Our sin nature caused that link to be broken, but being born again re-establishes it. Of course, the Spirit can communicate with us in other ways as well, but this is probably the one He uses most frequently.