After a rainy home triumph over the Titans, the Chargers head indoors to take on the defending Super Bowl champion Colts Sunday at the RCA Dome.  The Bolts rallied from a 6-0 halftime deficit with 17 unanswered points to earn their first postseason win since January of 1995.  Philip Rivers passed for 292 yards and the go-ahead touchdown as San Diego slipped past Vince Young and Tennessee 17-6 at home.  Now the Bolts hit the road to face the polished Peyton Manning.  San Diego has won seven straight games, including its last three on the road.  Indianapolis is coming off a first-round bye after winning the AFC South title with a 13-and-3 mark.  The Colts will be looking to avenge a 23-21 Week 10 loss at San Diego in which Manning threw a career-high six interceptions.  Indy fell behind 23-0 in the second quarter, but still had a chance to win when Adam Vinatieri pushed a 29-yard field goal wide right with 1:31 to play.  To compliment Manning and the passing game, Joseph Addai has rushed for more than 15-hundred yards and 10 touchdowns this season.