[Prefferle]

Originally Posted by Prefferle

Hello again,
so I’ve disconnected ABS Module plug, no corrosion ok, the brake light switch contacts ok. Harness condition looks good, no fraying or signs of damage.
Measuring blocks stable with test contact operating before light switch contact when pressing the brake pedal.
In drive testing I noticed the fault occurs when lifting off the brake. It appears that there may be a relationship between pedal position / electrical switch contact and brake pressure.
some observations when pressing the brake pedal:
Test switch operates at 10.7 Bar.
Brake Light Switch at 15 Bar.
Any chance you have brake pressures (measuring block 009) occurring at the two switching positions?

any additional guidance would be greatly appreciated.

UPDATE
Decided to:
1. remove ABS wiring harness Wrapping to check for any Internal corrosion or wire insulation damage between ABS plug and wheel arch area.
2. Replace brake light switch AGAIN with OEM grade part.
3. If no improvement - replace ABS module with refurbished warrantied unit.

I’ll update on progress....

Cheers,