Disco 2 Heated rear window and mirrors....help!

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Haystacks

Haystacks

Active Member
Posts
131
Location
Yeovil, Somerset
Hi all.

Having an issue with the heated rear window and mirrors on my D2. Basically there is no power going to them. Fuse is fine and there is power at the fuse, I can hear a relay clicking when I push the switch for the heated rear window, but can't locate it behind the dash? The wires running to the rear door, at the door shut are all ok. I have found threads with similar issues to this, but no conclusion. The switch for the window remains on for a limited time and automatically switches off, as it should.

Please can anyone point me in the right direction with this? Has anyone had a similar problem, and actually fixed it?

Thanks in advance!
 
Are you checking the correct fuse? I seem to remember having this issue and fuse seemed ok, but was looking at the wrong one. I think the correct one is in the fuse box under the bonnet. I'm going by memory here, so could be wrong.
 
The fuse is F8 interior fusebox but unfortunately the relay is built in the fusebox, soldered to the PCB, you have to check the connection in the plug behind the fusebox and that's not easy at all, if you have RAVE(as you need the connector views) i'll tell you more

btw did you check for voltage at the window element or at a mirror?
 
Thanks. I checked power at the heated rear window. Nothing. Neither mirror is getting warm. I did think the relay may be hard to locate or get at. There is a definite click from the relay when switching on the heated rear window. It just suddenly decided to stop working! I haven't got Rave, but could get it.
 
Come back when you have RAVE and i'll tell you where to measure or if you can get a cheap but 100% working fusebox swap that, it's plug and play the only trick is to disconnect the battery before the swap then after reconnection put ignition on II and leave it so 5 minutes as the IDM to regain communication with the BCU that's all.... also the fusebox must be from a non-facelift vehicle.
 
sierrafery said:
Come back when you have RAVE and i'll tell you where to measure or if you can get a cheap but 100% working fusebox swap that, it's plug and play the only trick is to disconnect the battery before the swap then after reconnection put ignition on II and leave it so 5 minutes as the IDM to regain communication with the BCU that's all.... also the fusebox must be from a non-facelift vehicle.
Click to expand...
Ok...thank you!
 
I'm downloading Rave onto my laptop now. I have managed to find a good 2nd hand fuse box, which should arrive tomorrow. Will swap them over, as per your instructions sierrafery, when I get chance, to see if that works. Thanks again.
 
Watching with interest as my symptoms sound identical to yours @Haystacks. I had all interior trim off the back door looking for damage to the wiring as previously had understood this was the most common fault.

It's a shame they hid the relay away in an inaccessible place.
 
Slightly different symptom on mine. Only just become apparent as i've been doing some early morning starts in the cold weather.

My rear window and RH Door Mirror both heat up properly, but my LH mirror doesnt. So presumably not the relay or fuses.

I'll get the multimeter out at the weekend, but any likely culprits to check? Sorry for hijacking this thread but thought it made sense to keep it all in one place?
 
private penguin said:
Slightly different symptom on mine. Only just become apparent as i've been doing some early morning starts in the cold weather.

My rear window and RH Door Mirror both heat up properly, but my LH mirror doesnt. So presumably not the relay or fuses.

I'll get the multimeter out at the weekend, but any likely culprits to check? Sorry for hijacking this thread but thought it made sense to keep it all in one place?
Click to expand...
Yeah, I have no power getting to mirrors or rear window.
 
Just a quick update, in case anyone is wondering, the fuse box I ordered seems to have been lost in the post somewhere. It should have arrived last Tuesday! I will post an update again when I finally manage to get one fitted, to say if it has cured the fault or not.
 
Ok. Fuse box fitted, and it's worked! Thanks sierrafery for the help! The relay in the old fuse box had quite a loud click, where as the new one is quieter, so maybe that's a sign if anyone else is having the same issue.
 
Well done! My relay has an audible click which I had taken to be a good sign. I will get the multi meter out to do some other checks but it sounds very much like this could work for me. Thanks for sharing.
 
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