Damn! The battery terminal ends connected make the battery look even smaller!
It's a tiny battery!
So I had to work all day yesterday. I'm going to play with the wiring today and see if I can get a functional brake light switch.
Friday night I got a 2nd person to help with the VCDS bleeding and I couldn't do it because without the brake light switch it can't detect pedal position and won't move beyond the first step...
I did use a magnet and bench test the GTI sensor to confirm what I need to replicate.
Pin 4 is constant 12v
Pin 2 is ground
Pin 3 receives power from pin4 when pedal is not engaged and lights are off.
Pin 1 receives power from pin4 when pedal is engaged and lights are on.
Next steps?
The brake pressure sensor is the same 4 pin connector but actually only uses 3 pins. So I need to determine which pin gets constant power and which pin gets activated when the pedal is engaged. Ground pin may not be used or I may have to ground it to the MC.
Next option is to also test the 6 pin connector which only uses 5 pins on the Touareg brake switch and I may need to de pin the factor connector and switch to the Touareg connector.
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