2 wd/ 4 wd lite is flashing and the engine brake is not working. How do I fix this?

 

Do some search first in this forum. You will find gizziling postings on that subject. Aslo, you need to post what model/year your quad is. And what's the time (0.5, 1.0 or 2.0 second) interval between 2WD and 4WD flashing - that's only half the cycle. The full cycle, obviously, would be twice long.