All Things Mk5 > How to Guides / Troubleshooting

How-To: Replacing Tailgate Wiring Loom

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Mykkael:
I had been having intermittent issues with the car locking with the boot open, when I looked in the left hand side rubber boot between the hatch and body, 3-4 wires had snapped with several more on the way. Ordered a new loom from VW 1K6971147H, around £72.

Took some photos whilst I did this:

Tools used:
Socket Set/Ratchet
Torx bits
Stanley Knife
Penknife
Patience
Swearing

I disconnected the battery first due to working around the rear airbag.

Took me about two hours total; 1/2 hr trim removal, 1 hr wiring, 1/2 hr replacement.

End result, no more random car locking issue with the boot open. Downside, my issue with the boot taking 2-3 attempts to get it to open is back, so will need to get a new latch fitted, job for another day :)

Remove rear seat bench:



Pull off seat side cushion, upwards and outwards. Undo Bolt at base for side trim:



Undo torx bolt at top of boot side trim:



Undo torx bolt at hatch side of boot side trim (I just pulled the boot lip trim aside to access rather than fully remove as I'm lazy :) ):



Remove boot side trim:



Pull down rear liner edge trim:



Undo C-Pillar trim bolt:



Undo rear side sill trim torx and remove trim:



Remove Airbag emblem and undo torx bolt:



Remove C-Pillar trim and unplug the three old connectors from the harness:



Thread the old harness back through the tailgate. I cut the old cable to the high level brake light at this point as I hadn't worked out how to remove it. I later worked out you could carefully pop out the brake light with a penknife in the end and disconnect that way:



Remove inner boot trim (two screws recessed in inner grab handles and then just pull, there are 4 clips along top, 4 at the bottom and two at the sides) Also just pull and remove inner rear window trim and then you should have access to everything:



To avoid confusion I cut the old loom at the hatch side and threaded the new one through to the body. I then only removed the old wiring as I had connected up the replacement as its a long loom with various plugs/connectors. Push the high level brake light cable back in through the hatch and connect up and carefully push light back in.

Degudodger:
Good write up  :happy2:

holepunch:
Thanks for posting this. My rear wash wipe has died and I noticed that several of the passenger side wires have broken/fractured. I've previously taken off the c pillar trim and dropped the headlining to fit a DAB aerial but it's helpful to see how some has approached the problem.

JIEEE:
V good guide indeed.

GTIEagles:
@Mykkael Thanks for writing up a great guide.

I was just reading it through and I'm slightly concerned about the part where you need to remove the high level brake light. Am I right in saying that you need to remove the light in order to connect it up to the new loom? If you do I'm not sure that you can remove it without breaking it (on the GTI at least) as I have been reading through a few guides where people have replaced the high level brake light and the only means of replacing it was by breaking apart... See here: http://www.golfgtiforum.co.uk/index.php?topic=121067.0

I'm hoping to tackle this job next week and don't want to be in the position where I can't finish it all on one day!

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