Wipers not working

[McTyke]

So finally. Seems there was no signal coming from the GM5 module to the wipers. Now I had had this repaired when I got the car as the central locking was not working. As you may know, when the GM5 is disconnected several components don't work - including wipers. So clearly there is something in the GM5 critical to wiper operation. Note - it was not throwing any error messages. So got a used GM5 of E-bay for £70 and once fitted and coded to car - wipers working. Booked in for MOT later so hopefully the lady who bought the car from me will have her back for the weekend. Hopefully I will be re-warded with some good karma considering the lengths I have gone to to sort out a sold as seen Z4. I didn't want her to get ripped off by some unscrupulous garage. Big thanks to Colin at BMS for his patience and knowledge.

 

[enuff_zed]

So finally. Seems there was no signal coming from the GM5 module to the wipers. Now I had had this repaired when I got the car as the central locking was not working. As you may know, when the GM5 is disconnected several components don't work - including wipers. So clearly there is something in the GM5 critical to wiper operation. Note - it was not throwing any error messages. So got a used GM5 of E-bay for £70 and once fitted and coded to car - wipers working. Booked in for MOT later so hopefully the lady who bought the car from me will have her back for the weekend. Hopefully I will be re-warded with some good karma considering the lengths I have gone to to sort out a sold as seen Z4. I didn't want her to get ripped off by some unscrupulous garage. Big thanks to Colin at BMS for his patience and knowledge.

Well done for persevering.
What led you to that then?

 

[McTyke]

I had tried everything else - it was Colin at BMS who then traced it to the GM5 and it was a case of it really can't be anything else. Still a nervous wait until this morning when he told me the wipers were working again. I had contacted the company who repaired the GM5 asking if he had come across any issues like this previously. He reckons wiper failure is nearly always motor or external relay and any issues relating to GM5 would throw up error codes. Clearly not the case. I had trawled the internet for hours and found no mention of GM5 and wiper failure.
Hope this helps anyone who have similar issues.

 

[enuff_zed]

I had tried everything else - it was Colin at BMS who then traced it to the GM5 and it was a case of it really can't be anything else. Still a nervous wait until this morning when he told me the wipers were working again. I had contacted the company who repaired the GM5 asking if he had come across any issues like this previously. He reckons wiper failure is nearly always motor or external relay and any issues relating to GM5 would throw up error codes. Clearly not the case. I had trawled the internet for hours and found no mention of GM5 and wiper failure.
Hope this helps anyone who have similar issues.

Indeed, thanks for detailing it all for future reference.