I have a 2002 Vauxhall Corsa C with an easytronic gearbox.

I think the wipers are beginning to fail (juddering, not parking and running slow) and I suspect I may need a new motor and or linkage but my question pertains to the gearbox and any electrical connection it has to the wipers.

When I turn on the wipers the gear select indicator flashes “F” the engine management light comes on and the car becomes stuck in a single gear even if the gear is neutral or reverse.

When I connect my laptop to the car to check for fault codes I receive the following:

$11and $18 “intermittent unrecognised code”

I can clear the faults and the car will change gear properly for a short time and then I have to clear the code again. After repeating the clearance 5 or 6 times the car works as normal until I need to wipe the screen again.

So how is the gearbox connected to the wipers and is there anything I need to check/be aware of before or while looking into the wiper fault?