Blinking Parking Brake Light. |
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Blinking Parking Brake Light. |
Olympic 914 |
Jul 3 2024, 08:32 AM
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#1
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Group: Members Posts: 1,699 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States |
Out running errands and when leaving I noticed the brake light blinking. I do use the parking brake a lot. so I pulled it on and off a couple times, no change. The brakes feel normal. Stopped for gas and checked the fluid reservoir, its at the proper level.
Then driving home, after a couple miles the light went off. (?) When I got home it was back on again. I am thinking maybe a wonky parking brake switch. But will check the switch on the master also Is the parking brake switch a Normal Open or Normal Closed? Anyone else have this happen ? Or know of something else I should check.... |
Superhawk996 |
Jul 3 2024, 09:41 AM
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#2
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Is the parking brake switch a Normal Open or Normal Closed? . . . know of something else I should check.... Normal open - switch closes makes ground for the bulb circuit. Check the wiring. Runs through the seat crossmember toward tunnel. May be intermittently shorting to ground if wire is chaffed. Same principle for the brake m/c switch wiring - make sure not chaffed / shorting to ground. [Note] there is a 3rd path on brown/white wire that comes from the seat belt flasher circuit. This is usually disconnected under the passenger seat but could be intermittently shorting on that ground wire too. |
porscheteck914 |
Jul 5 2024, 07:02 PM
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#3
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Newbie Group: Members Posts: 38 Joined: 23-March 23 From: n.c. Member No.: 27,247 Region Association: North East States |
Is the parking brake switch a Normal Open or Normal Closed? . . . know of something else I should check.... Normal open - switch closes makes ground for the bulb circuit. Check the wiring. Runs through the seat crossmember toward tunnel. May be intermittently shorting to ground if wire is chaffed. Same principle for the brake m/c switch wiring - make sure not chaffed / shorting to ground. [Note] there is a 3rd path on brown/white wire that comes from the seat belt flasher circuit. This is usually disconnected under the passenger seat but could be intermittently shorting on that ground wire too. I am having the same problem . So if master cyl switch is open, light in dash does not flash. All is good . If master cyl switch is sensing a problem with brake pressure it becomes closed and light flashes . Correct ??? If brakes and all wiring is good and dash light flashes that means master switch is bad ? Please help. Correct me if wrong . thanks , Paul |
Spoke |
Jul 6 2024, 07:16 AM
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#4
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Jerry Group: Members Posts: 7,051 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I am having the same problem . So if master cyl switch is open, light in dash does not flash. All is good . If master cyl switch is sensing a problem with brake pressure it becomes closed and light flashes . Correct ??? If brakes and all wiring is good and dash light flashes that means master switch is bad ? Please help. Correct me if wrong . thanks , Paul Correct on the switch: Open = normal Closed = Fault detected The MC warning switch should have a reset button. I tripped mine one time when I was working on the brakes. Don't remember what caused it but it tripped during the work. Pressed the button and been good ever since. |
porscheteck914 |
Jul 6 2024, 06:59 PM
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#5
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Newbie Group: Members Posts: 38 Joined: 23-March 23 From: n.c. Member No.: 27,247 Region Association: North East States |
I am having the same problem . So if master cyl switch is open, light in dash does not flash. All is good . If master cyl switch is sensing a problem with brake pressure it becomes closed and light flashes . Correct ??? If brakes and all wiring is good and dash light flashes that means master switch is bad ? Please help. Correct me if wrong . thanks , Paul Correct on the switch: Open = normal Closed = Fault detected The MC warning switch should have a reset button. I tripped mine one time when I was working on the brakes. Don't remember what caused it but it tripped during the work. Pressed the button and been good ever since. Thank you Jerry ! Reset button . Could someone send in a picture so I woild know what it looks like . -- of the reset button ....maybe that's all I need to. do. Thanks ALL . |
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