Master cylinder switch and reset. Options

[Keith914]

I have installed a new 19mm master cylinder that came with a single switch. My '72 harness to this switch has two wires each with a female "push on" connector, but the new brake master cylinder switch has only one male connector on it, next to the reset (?) switch. Two questions: 1) do I need to find a two connector switch, and 2) how do you reset the switch? I pushed the little black button into the switch and I think a felt it go in with a slight "snap".

[Keith914]

Yes a PITA! Any suggestions where I can buy one?
Further, also just tested my refurbished fuel delivery system with Tangerine SS tunnel pipe. All buttoned up, switched the ignition on, hear pump running, then smell gas. New in line (with T connection) fuel pressure gauge spewing gas, WTF. Removed the gauge, opened it up. Sure enough the solder connection expanding copper tube to brass base leaking!! Need a different brand 15p.s.i. gauge (carbs).

[BeatNavy]

Yes a PITA! Any suggestions where I can buy one?
Further, also just tested my refurbished fuel delivery system with Tangerine SS tunnel pipe. All buttoned up, switched the ignition on, hear pump running, then smell gas. New in line (with T connection) fuel pressure gauge spewing gas, WTF. Removed the gauge, opened it up. Sure enough the solder connection expanding copper tube to brass base leaking!! Need a different brand 15p.s.i. gauge (carbs).

One step forward, two steps backward, eh? Hang in there.

This is the only switch I saw, but I'm not 100% sure this is what you need for your application: https://europortparts.com/sku/90161311500.1...CFcYfhgodpSwN9g

May want to ask Eric at PMB.

[Keith914]

Yes a PITA! Any suggestions where I can buy one?
Further, also just tested my refurbished fuel delivery system with Tangerine SS tunnel pipe. All buttoned up, switched the ignition on, hear pump running, then smell gas. New in line (with T connection) fuel pressure gauge spewing gas, WTF. Removed the gauge, opened it up. Sure enough the solder connection expanding copper tube to brass base leaking!! Need a different brand 15p.s.i. gauge (carbs).

One step forward, two steps backward, eh? Hang in there.

This is the only switch I saw, but I'm not 100% sure this is what you need for your application: https://europortparts.com/sku/90161311500.1...CFcYfhgodpSwN9g

May want to ask Eric at PMB.

My apology, I now find the MC switch is not grounded -- appears to be OK. Brake warning light is still flashing when turning on ignition. Inspected emergency brake switch which is in good order. So left with tracing wiring (laborious and difficult) or the turn signal relay is faulty. Will test with a fellow 914Worlder's relay along with tracing the wiring from the emergency brake and master cylinder to the fuse panel.

[worn]

Yes a PITA! Any suggestions where I can buy one?
Further, also just tested my refurbished fuel delivery system with Tangerine SS tunnel pipe. All buttoned up, switched the ignition on, hear pump running, then smell gas. New in line (with T connection) fuel pressure gauge spewing gas, WTF. Removed the gauge, opened it up. Sure enough the solder connection expanding copper tube to brass base leaking!! Need a different brand 15p.s.i. gauge (carbs).

One step forward, two steps backward, eh? Hang in there.

This is the only switch I saw, but I'm not 100% sure this is what you need for your application: https://europortparts.com/sku/90161311500.1...CFcYfhgodpSwN9g

May want to ask Eric at PMB.

My apology, I now find the MC switch is not grounded -- appears to be OK. Brake warning light is still flashing when turning on ignition. Inspected emergency brake switch which is in good order. So left with tracing wiring (laborious and difficult) or the turn signal relay is faulty. Will test with a fellow 914Worlder's relay along with tracing the wiring from the emergency brake and master cylinder to the fuse panel.

I got eye strain tracing different wires on the several different charts available.

There is a thin line between clever and stupid. And Porsche was skating on that line. The warning light crams a lot in. First, the light tests itself through a diode when you turn the switch on until start up. Second there is the hand brake switch. Third is the wire to the shuttle in the MC. Finally on some models there is a wire to the seat belt system. If the buzzer has been disabled by normal routes that will not be a problem. I found on my '72 a taped-off wire to go to a float to tell you when the brake fluid is low. As far as I know I am the only person to have it installed cause they decided not to use it in production.

Uber-efficient. No wasted wires, and the good news is they are all brown with white and they all will activate the light and flasher if they are grounded. So - you can assume one of them is grounded.