I have a 04 Foreman Rubicon TRX500FGA that I purchased new in 2004.
I’m having an issue that hopefully someone is familiar with and could help me resolve.

When I turn the key on, modes D1 D2 ESP are all typically displayed on the led screen. I have to wiggle the shift knob back and forth until the N displays to start the ATV. To put it in Reverse, I have to wiggle the shift knob back and forth until the R displays. If I put it in Drive, wiggle until the D displays. Same with putting in Low.
Once I get the D to display, the ATV runs and shifts great. If I try to drive it while the D1 D2 ESP are all displayed, it will not shift.

There are no trouble codes being displayed, so not sure what’s causing this annoying problem. I’ve disconnected and cleaned every wiring connection.

If anyone is familiar with this issue, please let me know.
Chris