superbrite leds are supposed to be plug and play. keep in mind, current flows one way through them, so before buttoning up your dash, make sure the bulbs are in correctly and the lights work.
maybe some sort of resistor would have helped, but many of my superbrites died in 1-1 1/2 years. all my taskled led dome lights are fine four years later. i'm not going to hack into my already p.o. hacked wiring to add resistors for dash lights, i'm just going to go back to incandescent when enough go out to warrant pulling the dash again