Abs light on after mot???

**Slammedorion** · 15th March 2013, 18:34

07 plate Vectra has sailed through mot...
after the brake test the abs light is now on and not going off!!!
wtf there was nowt up with it before the test???

**Ian-Highlander** · 15th March 2013, 19:41

Quite common when a cars been on rollers of any kind, more common on rolling roads, I've not heard of it happening on a brake tester before.

Basically the system detects the front wheels rotating and not the rear and disables the system automatically as a safety precaution. It should reset after a couple of miles driving, if it doesn't then try pulling the battery off for half hour or so. If it's still on after that, then the garage has stuffed a sensor or something doing their inspection.

**Slammedorion** · 15th March 2013, 20:29

Think top ones the issue...
the other 3 are me turning ignition off while rolling to attempt to clear light???
We've cleared faults, touch wood ATM not has come back...
only done a couple of miles so will see???

**Das** · 16th March 2013, 08:42

What Ian said, the ABS system gets confused because the front(or Rears) are turning but the rears are not, and throws a wobbly.

**Slammedorion** · 16th March 2013, 13:20

It's back on and not clearing now...

**Slammedorion** · 16th March 2013, 14:21

Sorted now I think...
Jacked car up to check connection on inner wing.
Noticed a blue wire broken going into the connector ( car loom side, not sensor side ).
Soldered it up quickly for now, will add a little extra wire in when I wip wheel off to change the drop link...