Intermittent abs/traction control issue

[MikkiJayne]

Originally Posted by HPsauce

I thought the two sets of contacts did slightly different things and are triggered ever so slightly apart - a really tiny movement. IIRC one is for the brake lights and the other for the ECUs. So you could have a problem with the second set and not know as the brake lights appeared normal.

Yes thats it IIRC they have to go in the right sequence otherwise the ECU can't work out what is happening.