hello all, I have just purchased my first Patrol, a 03 Gu 4.8l, having an issue with the sub tank button and after searching and finding out about the transfer operation etc etc, mine still doesn' t transfer, its like the sub tank button is dead. It does nothing, the Sub tank light comes on with reds before stating, then goes out when engine starts

Q, should there be a light in the button when it has been pressed and operating ???? could someone please Help me

kind regards Streetsy