spig212

Thanks PetrolDave. Please see diagram attached. The measurement is shown by the bold blue arrow. I've shown on the diagram how I imagined the circuit. See the relay within the J519 part of the diagram. I wondered if the HRW dashboard switch sends a ground signal to the BCM which uses this to energise the relay. I imagined that the electrical path for the power to the HRW would only be via the relay contact since its high current.

I've been able to do some measurements this weekend and confident the wiring from the BCM to the rear window heater is sound. I did remove the fuse and with the heater operating (relay clicked on), measure from the BCM side of the fuse connection to the heater 'wires'. The resistance through the circuit was high (100s Kohms). I was expecting near zero ohms i.e. a direct connection through the BCM relay. Without seeing a schematic of the BCM can't really discern what's going on from this. As the car is in daily use not going to remove the BCM to take a look inside. So, conceded it'll be a phone call to local Skoda garage and discuss the problem with them.

That I don’t know as yet. Is it a direct connection between the J519 BCM connector to the HRW ? Once I’ve done this measurement I’ll post an update. (Thanks for replies so far)

Yes, fuse 41 is okay.

Hello, I'm new to Briskoda. My 2016 Fabia Mk3 heated rear window has stopped working. I've deduced that the battery is okay, the dashboard switch works and I can hear the relay operate in the Body Control Module. I have inspected the heater 'wires' in the rear windscreen and all looks okay. Resistance check gave me a reasonable reading of a few ohms. However, voltage reading at the heater was 0V. Hoping that someone has some ideas of where I should go from here. I'm wondering if something else might have failed in the BCM or a problem with wiring between the BCM and heater itself, or loose connector. I've attached an image of the heated rear window circuit. Thanks.