What do you do if your 2000 Fleetwood lights are blinking but your jacks are up?

Do you mean the warning lights that tell you that the stabilizing jacks are not retracted? That would mean that one or more of the hydraulic jacks has either not full retracted, or not folded up after being retracted due to a broken or weak spring (that happened to my 1990 Pace Arrow by Fleetwood, I used a bungee to get home to get it repaired), or one or more sensors that send the signal that the jack is stowed properly and the motorhome is ready to drive is not making contact or has gone faulty. Try pushing the jacks up by hand a little after they have folded up, if the warning lights go out then you need a new spring.