A couple of years ago, the electrics to the boot lid failed - brake lights don't operate, central locking does not release the lock, and the bulb in the boot does not light.
I had a repair of unknown specification done at CamSpec, which worked for some time but the issue has now returned. I'd love to fix or at least diagnose the issue myself, but no clue where to find wiring diagrams or even where the loom to the boot passes through.
Anyone else had this problem and can run me through your solution?
Nice one.
Failed boot electrics
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Wavey Dynamicist
- 2nd Gear
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- Joined: Fri Sep 13, 2013 1:02 pm
Failed boot electrics
2007 RS4 Saloon; Mugello Blue
Re: Failed boot electrics
Boot wiring harness repair kit should solve it.
https://www.auto-doc.ie/herthbuss-elpar ... 1277159%29

I had the same and it was a bad ground wire. Stripped back the loom and was a pretty obvious break. Known faulty area and happens commonly. I fixed it temporarily and put some loom tape over it. That's held up for like 2 years now though. Have bought a repair kit similar to above for when the job properly needs doing.
Pretty sure searching here gave me the info I needed to tackle it myself.
https://www.auto-doc.ie/herthbuss-elpar ... 1277159%29
I had the same and it was a bad ground wire. Stripped back the loom and was a pretty obvious break. Known faulty area and happens commonly. I fixed it temporarily and put some loom tape over it. That's held up for like 2 years now though. Have bought a repair kit similar to above for when the job properly needs doing.
Pretty sure searching here gave me the info I needed to tackle it myself.
Last edited by Zyox on Mon Sep 22, 2025 8:51 pm, edited 4 times in total.
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Wavey Dynamicist
- 2nd Gear
- Posts: 225
- Joined: Fri Sep 13, 2013 1:02 pm
Re: Failed boot electrics
Removed - posted without quote.
Last edited by Wavey Dynamicist on Tue Sep 23, 2025 10:10 am, edited 1 time in total.
2007 RS4 Saloon; Mugello Blue
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Wavey Dynamicist
- 2nd Gear
- Posts: 225
- Joined: Fri Sep 13, 2013 1:02 pm
Re: Failed boot electrics
Thanks for digging that out. Searching 'boot electrics' didn't present that thread strangely. I don't get any malfunction indications on the dash strangely, so i wonder if the issue is slightly different.
Any feeling on how difficult it is to get access to the routing for that loom if i want to replace it?
Thanks
2007 RS4 Saloon; Mugello Blue
Re: Failed boot electrics
Literally just open the boot and it's the loom on the left. Can see the pics in that thread I linked. Just a fiddly and long job I'd imagine but very doable with a kit like that.
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