Yes, check your new solder joints. From what I can see some don't look real "clean". Did you use a very small (micro) solder tip and very thin electronic solder? Also, I think I see evidence of solder bridging. Did you spill some hot solder where it should not be? Reheat those new joints until the joint goes from dull to very shiny. Actually, I would do every one that holds the leads to the lamps that are no longer working. Having once worked as an electronic tech I would also scan the board very carefully around all lamps and ground points. Use a high-power magnifying glass and strong light. Doing this you can sometimes see hairline cracks in new and old joints; a dead giveaway to a poor solder job. I've embarrassed myself many times.
2001 SSEi- black; stock 92K
1995 Vette; Competition Yellow; stock; 38K