I know its not a Toyota, but just incase anyone has a fair idea, or has had the same problem..
I got home from town just before, jumped out of car, sweet as. Next thing park lights pop on... Went back in car made sure no switches were on, turned lights on and then off again, all was sweet for 5 seconds then they come back on..
Now I don't think there's a park light switch in the car, other than on the stalk.. So could it be a wiring issue? Ground etc? Ill give it a good check tomorrow, but thought i'd ask incase anyone on here has had this.