Last year my '99 1500SE started having intermittent issues going into reverse. Usually I could move the reverse handle back and forth and it would work. Last time I tried to use it, nothing. It's locking the rear tire, but the "R" light doesn't come on, and when pushing the starter button, the headlight flashes but that's it. I checked all the common culprits, but all seem OK. What am I missing?