 Master cylinder switch and reset. |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| Keith914 |
 Jul 1 2016, 04:30 PM
Post
#1
|
|
Member  Group: Members Posts: 248 Joined: 29-April 16 From: Laguna Beach, California 92651 Member No.: 19,948 Region Association: Southern California  |
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".
|
   |
 
|
  |
Replies
| BeatNavy |
Jul 1 2016, 04:59 PM
Post
#2
|
|
Certified Professional Scapegoat Group: Members Posts: 2,953 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region 
|
The old MC switches grounded with the brown wire on your wiring harness. The new switch grounds through the MC itself. Just tape up the brown wire on your harness - you don't need it with the new MC.
That switch you pushed should be the reset switch. |
 |
|
| Keith914 |
Jul 2 2016, 12:54 PM
Post
#3
|
|
Member Group: Members Posts: 248 Joined: 29-April 16 From: Laguna Beach, California 92651 Member No.: 19,948 Region Association: Southern California |
QUOTE(BeatNavy @ Jul 1 2016, 03:59 PM)  The old MC switches grounded with the brown wire on your wiring harness. The new switch grounds through the MC itself. Just tape up the brown wire on your harness - you don't need it with the new MC. That switch you pushed should be the reset switch. I have completed your suggestion to properly connect the harness to the master cylinder switch but no change in problem symptom. In my search I pulled the gas/brake warning light gauge out and cleaned up some of the harness gauge connections. I found a strange (to me) connection between the generator light and the brake warning lights, about 4 inches long beginning and ending with about 1 inch of typical harness size insulated copper wire, each with a female connection to the gauge lights mentioned above, but about 2 inches in the middle of a length of strong bare silver wire shrink wrapped in shiny black plastic about 1/8" diameter encased in a hard black plastic tube slipped over the shrink wrap. This wire is soldered at each end to the two 1" lengths of typical harness wire mentioned above. One of the soldered connections was broken. I repaired (solder) it, but it has not corrected the fault I am attempting to fix? I am about to remove the driver's seat to access and check the operation of the handbrake switch. |
|
|
|
Posts in this topic
Keith914 Master cylinder switch and reset. Jul 1 2016, 04:30 PM
Keith914
The old MC switches grounded with the brown wire ... Jul 4 2016, 09:34 AM
Keith914 Thanks for your prompt helpful response. I will re... Jul 1 2016, 06:13 PM Keith914
Thanks for your prompt helpful response. I will r... Jul 2 2016, 11:07 AM era vulgaris Are you talking about the blinking light that... Jul 2 2016, 11:43 AM Larmo63 :agree: Jul 2 2016, 12:11 PM Dave_Darling That thing you describe may be a diode to keep the... Jul 2 2016, 01:25 PM Keith914
That thing you describe may be a diode to keep th... Jul 2 2016, 06:16 PM Keith914
That thing you describe may be a diode to keep th... Jul 5 2016, 08:02 PM BeatNavy Stupid question, but does the brake system need to... Jul 2 2016, 01:53 PM Keith914
Stupid question, but does the brake system need t... Jul 3 2016, 09:21 AM BeatNavy
Stupid question, but does the brake system need ... Jul 4 2016, 01:41 PM Keith914 Not a stupid question. Along with replacing the ma... Jul 2 2016, 02:08 PM Keith914 Yes a PITA! Any suggestions where I can buy on... Jul 4 2016, 03:56 PM BeatNavy
Yes a PITA! Any suggestions where I can buy o... Jul 4 2016, 04:43 PM Keith914
Yes a PITA! Any suggestions where I can buy ... Jul 5 2016, 09:45 AM worn
[quote name='BeatNavy' post='2367475' date='Jul 4... Jul 5 2016, 10:37 AM Dave_Darling Find what is grounded. Is the MC switch providing... Jul 4 2016, 10:40 PM BeatNavy That's progress, I think. I would rather trac... Jul 5 2016, 10:04 AM Keith914
That's progress, I think. I would rather tra... Jul 5 2016, 12:21 PM Keith914 Mine is a '72. I don't have a brake fluid ... Jul 5 2016, 12:28 PM Keith914 Looks like I found the problem. Earlier in this st... Jul 6 2016, 12:09 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 3rd July 2025 - 10:16 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.