CCM / Electric Windows Help

[d1s]

Been having this problem for a few months.
All of the electric windows stopped working suddenly.
Although, every once in a while, they will work until I turn the car off again.

I've checked the door harness wiring, the CCM, and the CCM wiring and all seems to be okay.

Anyone else had this problem?

What could be causing this?

Thanks

 

[vag-tech]

All power/grounds confirmed good at time of fault?

 

[d1s]

All seemed to be fine. All other CCM functions seem to be working, just not the Electric Windows. Strange how they do work every now and then though.

 

[vag-tech]

If you PM VIN and Reg I'll pull circuit diagrams and advise on appropriate tests.

 

[j4jon]

I've got a friend that had this same problem with his Seat Exeo (the A4 with different bumpers) we ended up replacing the CCM unit. I took the old unit apart afterwards and one of the relays had failed. If would be possible to remove the CCM open it up and test each relay, if one has failed you can buy the relays for IIRC about £10.