My tailgate glass wont open on my Touring (Wagon) and I suspect it's because the GMCU isn't coded right.
I don't want to pay 100 euros!!! (yes 20 second job and that's what theyre asking) to get it recoded when I might be wrong!
I know the motor and the lock work as when I bypass the relay it works fine
My question is ..how much current (and from where?) would need to be supplied to the relay trigger terminal if i bypass the gmcu?
it's pin 31 from plug x253 and it's a white and blue wire (RERHS) which goes to pin 4 on the relay. my gmcu is (i believe) not coded to supply an appropriate current so if i can find an alternative (live when the car is unlocked) and use the tailgate window switch to complete the circuit i should be in business