Rear electric windows blow fuse

[Horncastle]

Hi!

I have an LTI TX2 (ex-London taxi) which I am currently prepping for a European adventure in the summer. One of the (many) things currently wrong is the rear electric windows.

Sometimes they work okay for a day, other times the fuse will blow when the window is half way down, some times it will pop after the fuse (30A) is replaced and all I've done is turn the engine on. It doesn't matter which side or which switches are used (there's no common denominator).
I have a multimeter but no real clue what I am doing... how do I start logically ruling things out/in of this annoying issue? Is there a common earth for the rear windows? Both rear windows are on the same fuse (as per design)

When they do work, the windows slide up and down as well as you would expect on a 2005 car with 354,000 miles on the clock. The front ones work perfectly fine.

Help please

[Rich]

Sounds like a short in the door harness to me. That would give the symptoms you’ve described

[briang]

Just to add to Richs comment, I would be checking the wiring between the door and the door pillar as it being bent every time the door is opened and closed...

[Paul]

I think I've said elsewhere, £5 on it being a dodgy wire on them rear USB plugs I've fitted.

Door cards pull off dead easy on these so crack on 🙂

[Horncastle]

Thanks everyone! Turned out to be something near the switch on the o/s/r. Pulled it all apart, taped it up again properly, all seems okay now*

*for as long as I could be bothered to stand there with the engine running pressing buttons to see if it would fail again