Tailgate opening at random

[cj10jeeper]

Over the last couple of weeks a very strange problem has arisen.

The tailgate simple unlatches itself as if the key or open button were being pressed when starting off. This mainly happens when engaging reverse gear, but sometimes when switching the headlights off. Typically it will happens just as the vehicle begins to reverse.

Very frustrating at I have to dive out and close it from which point it will function perfectly.

It as if some combination of starting, lights on/off and moving triggers a rogue signal to the tailgate lock.

Anyone seen or heard of anything like this? The vehicle is pretty much stock aside retrofit xenons with relays, but they were fitted well over a year ago without any issue.

Cheers
Cj10jeeper