oilbrnr
Member
I’m installing a sophisticated brake controller on my ‘12 Passat TDI SEL (Redarc Tow Pro Elite) which requires a trigger signal for brakes. Some are telling me that the signal from CHMSL is powered by PWM system ....this would not be acceptable. Additionally the circuit needs to accept nominal voltage in override mode to display brake lights when application is made from controller ( ....and just imagine the havoc this could create with the VW electronics diagnostics!). I spent considerable time under the dash looking at the brake pedal and hoping to find a simple micro switch. I could find nothing. Is it possible the electronic switch for lights is a hydro activated unit on the engine side of the firewall?