[MattKab]

Zen,

The increased efficiency of the Porsche brakes on a Bug gives rise to a normal braking* fluid pressure much lower than stock.

When I upgraded my brakes, I watched my voltmeter display the volt drop due to the brake lights, at a significantly reduced amount of pedal effort. Pressing the brake pedal minimally to light the back up when approaching a Junction in the dark required pulling up MUCH quicker than the car behind. This suggested to me the stock brake switch is rated at a pressure specific to stock VW braking system. I'm not the first to experience this??

I fitted a microswitch to a bracket secured behind the head of the top m/c bolt, an M8 bolt in 1" of fuel hose is cable tied to the pushrod and is adjusted to put the brake lights on when braking in rolling traffic, just like everyone elses.

The microswitch is wired in parallel to the pressure switch and are connected so that either serves to ground the coil of a relay for reduced load on the switches. Nothing is butchered on the car. The relay can take a shared feed from the brake/horn live at the connecters near the brake fluid reservoir (late Bug) and this is where the two core wire connected to the microswitch terminates. A few piggyback and male spades prevent any cutting.

Do not overlook the response of your brakelights for safety's sake.

Matt