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Mk4 wiring harness to wheel speed sensor

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I have a damaged offside rear cable to the wheel sensor on my Polo Mk4 (9n) 2002 1.2S (64) - see picture. That's causing the ABS light to come on. It can be replaced but VW no longer supply it. Would anyone know how I can source or even what the part number is? Have had my Polo for years and not ready to give up on it. Many thanks.

Polo 9n - offside rear cable to wheel sensor.jpg

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  • WorkHorse
    WorkHorse

    Just wanted to wrap this up and thank everyone for the help. Many thanks to @Pete1 who did a perfect job on the localised repair and is a goldmine of useful info. Sensor working, ABS light out and cou

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  • Author

Thank you for providing the forum and very many thanks for your help. Much appreciated.

The only catch is, they don't really plug in to the car's loom anywhere, just disappear into the mass of wires, so it's cut the old section out and join the wires. 

 

The plug's basically the same on any VAG car, so if you don't want to be spending that sort of money, cutting a cable out of a car in a scrap yard can be an option, just inspect it well when you take it off. Polo/Fabia/Ibiza ones seem to wear out, Golf/Jetta/Octavia ones seem to have a bit more slack in the cable so are normally OK. 

Edited by Yeti

  • Author

Thanks Yeti. I guess the cutting and splicing might affect resistance and therefore whether the ABS light comes on. Worth it to me to get the new part (6Q0927904E in my case) but not confident I can do the cut and splice. My problem will be finding someone to do it I expect. If you have any suggestions I'd be grateful. Appreciate your help in any event.

Cutting and splicing should not affect the circuit resistance, there are loads of youtubes on how to splice wires, if you've got a hot-air paint stripper ? these work well https://www.ebay.co.uk/itm/122221630671/  

  • Author

Thanks nige8021. I'd just had my fingers crossed that 6Q0927904E simply plugged into connection under back seat (see picture). More of a challenge to cut and splice but learning opportunity. Many thanks.

under back seat offside.jpg

Don't cut into that connector it's the fuel pump ! 

 

I must admit I'm surprised that if the picture of the loom in the parts listing is correct that there isn't somewhere for the connector to plug into but I've not seen what the wiring is like on your model so can only go by what @Yeti says 

  • Author

Ha! Thanks @nige8021 . Am really thinking that me and cutting & splicing don't mix. Yes, looking at the part - https://www.lllparts.co.uk/product/wiring-harness-for-speed-br-sensor/mpn/6Q0927904E) - it does look like there's a connector. Mind you, I'm the guy who was looking at the fuel pump! Thanks to you and @Yeti though - at least I'm getting a clearer picture. Much appreciated.

If you have a look at the photo here, It definitely shows free ends to the cable that will need splicing into the interior loom.

https://www.ebay.co.uk/itm/125380224475?hash=item1d313e65db:g:ymMAAOSwpY9iseo9  (significantly cheaper than the LLL offering).

 

Does your car have a wear sensor on the OSR brakes?  Looks like that loom has two connectors, one for ABS sensor, the other presumably for wear sensor.

 

I would be tempted to just do a localised repair if the sensor connector is undamaged. Just cut out the damaged part, strip back the outer insulation, slide some large diameter  adhesive heatshrink over the outer, join in some similar wires to bridge the gap, each with its own heatshrink covers at the joins, then shrink down the large heatshrink over the whole lot.

 

Bring your car over to me, I'll do it for you for a small fee... 🙂

 

 

 

 

 

  • Author

Oh yes. So what @Yeti  says - tricky. Yes, have got the pad wear sensors. I'm thinking localised repair is by far best idea - thanks. If you're serious about trying to repair for fee, that'd be great. Appreciate no guarantees but crazy not to give it a shot. It Looks like you're easy to get to from me and I'm not in huge rush so whenever it works easiest for you. Drop me a message and I'll give you a shout. Really appreciate all this help anyway.

  • Author

Just wanted to wrap this up and thank everyone for the help. Many thanks to @Pete1 who did a perfect job on the localised repair and is a goldmine of useful info. Sensor working, ABS light out and couldn't be happier!

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