This guitar wouldn’t turn off and was draining batteries. The action was also high and uncomfortable to play. After checking the wiring I found that the output jack wasn’t disconnecting the battery from ground when it was unplugged, I guess it must have been pulled at some point which broke or bent the connections inside the jack. You can’t repair barrel jacks or end pin jacks like this so it needed to be replaced.
To lower the action I first needed to address the uneven frets so I levelled and re-crowned them, I got the saddle as low is it would go which did improve it, but to get it any lower I would need to plain the top of the bridge down, I’ll wait for the owner to tell me if it’s low enough.
It’s always much harder with left handed guitars as you have to rely more in measurements than feel.