 How do you reset the master cylinder brake switch, The 2 wire type |
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| 913B |
 Sep 5 2016, 08:30 PM
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#1
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Senior Member  Group: Members Posts: 881 Joined: 25-April 05 From: South Bay/SoCal Member No.: 3,983 Region Association: None  |
The brake switch on my master cylinder has 2 wires. I didn't see any reset button. When I unplug the brown/white signal wire going to the brake light in the gauge. The brake light will respond accordingly to the hand brake and go out. Before it would stay lit all the time regardless if the handbrake was applied or released.
So the question is how do you reset the brake switch or do I need to bleed the brakes ?? The brake light was working fine until the transport company moved my vehicle. I think the driver may have applied the brakes too hard maybe (IMG:style_emoticons/default/confused24.gif) Let me know you thoughts. Thanks everyone ! (IMG:style_emoticons/default/driving.gif) |
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| Krieger |
Sep 5 2016, 09:36 PM
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#2
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Advanced Member Group: Members Posts: 4,874 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None 
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The reset is on the left side of the master cylinder. You can get at it without lifting the car. Turn the steering wheel all the way to the right. Get a flashlight. It is a small rubber protusion maybe 5mm on the left side. Just push it back in. You also might want to check the switch under the handbrake. It is on the crossmember. It may be stuck, broken or corroded. It is also possible the handbrake is not making contact with the switch and is not pushing the switch down when you put the brake handle down. My gauge light flashes red when the e-brake handle is up.
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| 913B |
Sep 5 2016, 10:06 PM
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#3
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Senior Member Group: Members Posts: 881 Joined: 25-April 05 From: South Bay/SoCal Member No.: 3,983 Region Association: None |
QUOTE(Krieger @ Sep 5 2016, 08:36 PM)  The reset is on the left side of the master cylinder. You can get at it without lifting the car. Turn the steering wheel all the way to the right. Get a flashlight. It is a small rubber protusion maybe 5mm on the left side. Just push it back in. You also might want to check the switch under the handbrake. It is on the crossmember. It may be stuck, broken or corroded. It is also possible the handbrake is not making contact with the switch and is not pushing the switch down when you put the brake handle down. My gauge light flashes red when the e-brake handle is up. The handbrake part works fine. With the signal wire that goes to the gauge disconnected. The handbrake operates the brake light fine. Thanks for tip |
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Posts in this topic
porsche913b_sp How do you reset the master cylinder brake switch Sep 5 2016, 08:30 PM
porsche913b_sp
The reset is on the left side of the master cylin... Sep 5 2016, 10:03 PM Krieger Post a pic of your master cylinder Sep 6 2016, 09:33 AM North Coast Jim
The brake switch on my master cylinder has 2 wire... Sep 6 2016, 12:02 PM
Kansas 914 It is the black "shaft" in this picture.... Sep 6 2016, 12:12 PM porsche913b_sp I wish I had a pic of my switch the center part is... Sep 6 2016, 01:07 PM porsche913b_sp So I have come to the conclusion there is no reset... Sep 8 2016, 09:36 PM Garland I have the same concern, have left the one wire lo... Sep 8 2016, 10:20 PM Garland
I have the same concern, have left the one wire l... Sep 8 2016, 11:36 PM porsche913b_sp you want to switch to 2 pole ?? You mean to replac... Sep 8 2016, 10:41 PM Dave_Darling I have a two-pole switch with a reset button...
M... Sep 9 2016, 09:55 AM NoEcm I just installed a new single pole switch because ... Sep 9 2016, 10:35 PM porsche913b_sp Thanks everyone for the contributions. I want to s... Sep 11 2016, 04:50 PM Kemo im bringing up this old thread because im having a... Jun 13 2026, 01:02 PM emerygt350
im bringing up this old thread because im having ... Jun 13 2026, 01:15 PM emerygt350 And to answer the 10 year old question... Here yo... Jun 13 2026, 01:19 PM Kemo thanks for the response...my car has the same 2 po... Jun 13 2026, 05:24 PM DeanBob So I am piling onto this long-in-tooth post with a... Aug 7 2026, 11:16 PM |
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