[LeftOverParts]

Recommend physically checking the fuse.

I realize you said the new bulbs are the same as old but the dim bulb suggests it runs on a different voltage or you have high resistance in the line.

If the fuse is good, you might remove both new bulbs and see if the 12V puck lights work. Then try the old, good bulb. If they work, you know it's not the switch. If the pucks still don't work, check the switch.

I suppose it's possible you lost a ground or wire connection but seems remote.

Might be worth confirming the bad bulb is actually bad - either with a meter or installing it where the good bulb was.

Good luck!