Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

> Brake warning light, The quest for success continues
PaIsa
post Sep 13 2024, 05:34 PM
Post #1


Member
**

Group: Members
Posts: 86
Joined: 13-June 24
From: Quebec, Canada
Member No.: 28,180
Region Association: Canada



So I am back trying to get my brake warning light to work properly. The situation before I started searching for the solution was the following:

Brake warning light was always blinking whatever the car condition. Blinked with the ignition ON. Blinked with the engine running and hand brake applied (normal). Blinked with the engine running and hand brake removed. Blinked with the engine running, hand brake removed and MC wire disconnected. So basically, blinking all the time!

So I was investigating the emergency (hand) brake wiring. Remove the seats, center console, etc. Looked at the emergency brake switch and seemed to work OK. There was a contact (closed circuit) when the switch was in position where the emergency brake would be applied and no contact (open circuit) when the hand brake would be removed. Looked on the wiring for evidence of short to ground but was not able to find anything. The wire goes in the center tunnel and is accesible until the shifter where rather then following the main wiring harness and the speedo cable, it goes under and God knows where it goes!! So I was not able to follow it all the way.

Now I have some disconnected wires near the brake fluid reservoir (already a thread on this trying to understand where these should go). The wires are brown-white and brown-white connected with a brown wire. The brown-white wire that is connected with the brown wire is cut.

So after I reassemble the emergency brake wiring, I did some test again.

Ignition ON, the brake light comes ON. Whit the engine running, no more brake light blinking.

So now I tried with the cut wire (the one near the brake fluid reservoir) reconnected. Brake light blinking all the time. Disconnect the wires, no more blinking when the engine is running.

I am lost. Even writing this I am not sure if I am right with the tests I did and the results I got.

Anyone has any advice? I looked at the wiring diagram, but not sure!!

I would like to have this working but don't want to go crazy with this!!

The car is a 1972.



User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
Geezer914
post Sep 13 2024, 07:59 PM
Post #2


Geezer914
***

Group: Members
Posts: 1,819
Joined: 18-March 09
From: Salem, NJ
Member No.: 10,179
Region Association: North East States



You need a wire diagram for your 914 depending on the year to trace the color of the wire going to the hand brake switch.
User is online!Profile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
PaIsa   Brake warning light   Sep 13 2024, 05:34 PM
Geezer914   You need a wire diagram for your 914 depending on ...   Sep 13 2024, 07:59 PM
Garland   Link to Workshop Manual #8 Electrical @paIsa ...   Sep 13 2024, 09:11 PM
Ishley   I have a 72... and I went out to my shop and looke...   Sep 13 2024, 09:39 PM
Ishley   It's item 34 on the wiring diagram.   Sep 13 2024, 09:45 PM
Spoke   Here's a simplified schematic of the turnsigna...   Sep 13 2024, 10:45 PM
Literati914   Is there a wire plugged in at the bottom of the E-...   Sep 13 2024, 10:56 PM
PaIsa   Thanks for all the answer. I knew my initial mess...   Sep 14 2024, 05:04 AM
Superhawk996   Now for the stupid question: When testing this ca...   Sep 14 2024, 01:15 PM
PaIsa   Thanks for the good reply. I have a DMM and I kno...   Sep 15 2024, 06:30 AM
worn   Thanks for the good reply. I have a DMM and I kn...   Sep 18 2024, 04:01 PM
Ishley   If the light is always on…. Regardless of the sw...   Sep 14 2024, 09:30 AM
Literati914   ..The original wire seems to be brown-yellow, alt...   Sep 14 2024, 10:49 AM
PaIsa   ..The original wire seems to be brown-yellow, al...   Sep 15 2024, 06:36 AM
PaIsa   ..The original wire seems to be brown-yellow, al...   Sep 15 2024, 08:42 AM
Superhawk996   That's interesting.. when you raised the qu...   Sep 15 2024, 10:20 AM
Superhawk996   So now I tried with the cut wire (the one near ...   Sep 14 2024, 01:33 PM
Superhawk996   So at this point what is the main issue? If I’...   Sep 15 2024, 07:51 AM
PaIsa   So at this point what is the main issue? If Iâ€...   Sep 15 2024, 08:36 AM
Superhawk996   :rotfl: :headbang: Oh man, that is a crazy set ...   Sep 15 2024, 10:16 AM
PaIsa   :rotfl: :headbang: Oh man, that is a crazy set...   Sep 15 2024, 02:26 PM
Literati914   @[url=http://www.914world.com/bbs2/index.php?show...   Sep 15 2024, 12:35 PM
PaIsa   [quote name='Superhawk996' post='3167858' date='S...   Sep 15 2024, 02:30 PM
technicalninja   Pulling the flasher unit might be another "el...   Sep 15 2024, 02:11 PM
Dave_Darling   Have you checked the electrical switch in the side...   Sep 15 2024, 09:29 PM
PaIsa   Have you checked the electrical switch in the sid...   Sep 16 2024, 05:25 AM
Literati914   Have you checked the electrical switch in the sid...   Sep 15 2024, 09:47 PM
PaIsa   One last comment/question before I put this to bed...   Sep 16 2024, 03:05 PM
Superhawk996   Your harness tape is not original nor is the way t...   Sep 16 2024, 07:40 PM
PaIsa   Your harness tape is not original nor is the way ...   Sep 17 2024, 05:02 AM
Dave_Darling   With no key in the ignition, the "parking lig...   Sep 17 2024, 03:45 PM
PaIsa   With no key in the ignition, the "parking li...   Sep 18 2024, 05:08 AM


Reply to this topicStart new topic
10 User(s) are reading this topic (10 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 15th January 2025 - 06:01 AM