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> How do you reset the master cylinder brake switch, The 2 wire type
913B
post Sep 5 2016, 08:30 PM
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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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Kemo
post Jun 13 2026, 01:02 PM
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im bringing up this old thread because im having a few issues with a blinking red light in the dash above the fuel level.

ive been banging my head against the wall on this one. i have a 1973 1.7 and i have a 2 pole brake switch that does not have a reset. i have two wires plugged into it and if i pull them out it makes no difference.
so my fasten seatbelt light is on when the brake is down or up...its real iintermittent as im moving the brake up and down. but it goes out when buckled.

on the back of the cluster, if i pull the "black/white stripe/green wrap stripe" wire, the blinking stops and the fasten seatbelt light continues to work until buckled.

any ideas here? i did recently replace the soft lines and one hard line and bleed the brakes.

thanks for any help, just trying to get the electrical sorted out before attempting to get the motor in there.
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emerygt350
post Jun 13 2026, 01:15 PM
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QUOTE(Kemo @ Jun 13 2026, 01:02 PM) *

im bringing up this old thread because im having a few issues with a blinking red light in the dash above the fuel level.

ive been banging my head against the wall on this one. i have a 1973 1.7 and i have a 2 pole brake switch that does not have a reset. i have two wires plugged into it and if i pull them out it makes no difference.
so my fasten seatbelt light is on when the brake is down or up...its real iintermittent as im moving the brake up and down. but it goes out when buckled.

on the back of the cluster, if i pull the "black/white stripe/green wrap stripe" wire, the blinking stops and the fasten seatbelt light continues to work until buckled.

any ideas here? i did recently replace the soft lines and one hard line and bleed the brakes.

thanks for any help, just trying to get the electrical sorted out before attempting to get the motor in there.


The switch for the parking brake is down on the floor under the parking brake lever. Fills with garbage over the years. Pull the driver seat and clean it up...
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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
Krieger   The reset is on the left side of the master cylind...   Sep 5 2016, 09:36 PM
porsche913b_sp   The reset is on the left side of the master cylin...   Sep 5 2016, 10:03 PM
porsche913b_sp   The reset is on the left side of the master cylin...   Sep 5 2016, 10:06 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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