I changed mine after it started to take in water. As I recall, the "exact" replacement had a different number of wires so I cut the wires, experimented to find which to use, and used butt splices to put it back together. The replacement is now fading,getting lighter. The good part is that they have red LEDs in them so still light up red even if the lens goes totally white.
Paul (KE5LXU) ...was fulltimin', now parttimin'
2003 Winnebago Ultimate Advantage 40e
towing 2017 Jeep Grand Cherokee Limited