Hi I have had a problem with my offside abs cable.

 

The scan tool says an error in the circuit

Fault code: 00285

 

I've had a look at the harness connector and the pins were corroded and the wire had broken from rust under the the little boot cover on the harness case.

 

I've bought a replacement harness connector with 2 wires already connected. 

 

I've cut the old wire back and the grey wire is still corroded, I've kept cutting it back and it seems to be corroded quite far back.

 

I'm guessing it will be ideal to just replace the whole wire.

 

The grey wire is more black and copper rust would normally be green, and feels really thin and abit like bristles on a brush, where as the green wire is nice and clean and strong strands.

 

Is it a certain type of wire on the abs cable where one wire is a different material or should they both be strong copper strands.

 

It looks like a 0.75 cable but I'd have to check, could I just get a reel of twin copper cable, or am I best getting a vag one online. 

 

It doesn't look at bad on the photo but you can see the difference between the two.

 

Hope I made sense of that lol 

0.75mm² is the correct wire size, and both should be the same material, copper, I'm sure.

Once insulation gets cracked or worn through, water gets in and wicks along by capillary action.  It looks like yours has only been 'leaking' into the black wire.

Any old wire should do if you need to extend beyond where the repair wires will reach, to find clean copper to join to.  Making sure the joins are protected from water is obviously key to a lasting repair. 

Thanks for confirming the size.

 

That makes sense, ill get some twin wire with some decent outdoor grade insulation on it so it doesn't get damaged by the frost

 

I've got some heat shrink butt connectors, and I'll heat shrink over that aswell, I'll keep cutting it back untill it's undamaged and go back to the sensor from there. Luckily the little rubber mounts on the cable come off so I can put it on the new wire and keep it tidy.

 

thanks for that, hopefully the weather holds off on Thursday when I'm free

 

I managed to sort the wire.

 

The wire was still rusted right up to to top of the wheel arch, so I took the wipers off and the plenum chamber to get to the wire loom at the top of the bulk head, I unwrapped the insulation tape to connect it there, but it was still rusty, so I unwrapped it half way across and it was the same so I decided to just feed the wire straight across to the abs unit harness and connect it there, luckily it was nice clean copper at that end.

 

And a bonus I managed to kill two birds with one stone as Ive been wanting to clean it all out under the plenum chamber and make sure the drain holes wasn't clogged

 

The abs light went straight off after I put the battery terminal back, I did a scan and nothing showed, and did an output test on the speed sensor and all 4 wheels was picking up the speed.

 

All together it was £6 for the sensor harness connector, and £6.95 for a 10 metre reel of twin 0.75, and I already had crimps, heat shrink and loom tape. 

 

So it was a nice cheap fix, thanks for your help.

 

If anyone comes across this post in the future here is the wire digram for the 5j model and some photos of it done.