Mine did the same thing for a while. Then it stopped and hasn't done it for over a year. I never did figure it out, but I did replace the ground ribbon under the hood. (Don't recall that taht fixed it). Post if you figure it out.

97tj, Shaved Ford 9 rear, 4:10's, New 35x12.5 BFG KM2's to test!, Warn x8000i, ARB's, Quick Disco's, Hand Throttle, & it's my DD. smile