I took a coil off the valve and and swapped it with the coil off the differential lock which is identical and the PTO works fine
Dare I say it but to get a plane home we'd do the same. You can fly without things like a standby generator (you have to have 3 generators fail before you get down to the standby), but not more important stuff. If we've had a valve go down we have swapped the drives around so the punters can get home.