 Brake light on 1973, it just won't stop flashing... |
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| emerygt350 |
 Dec 14 2021, 03:43 PM
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#1
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Advanced Member  Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
I just tried bleeding the brakes, I pulled up and cleaned and tried messing with the wires for the parking brake switch, nothing makes it stop flashing!
Any ideas? Should I try the switch again now that I bled the brakes? This is one of the master cylinders without the little reset button. It's been flashing since I had a shop 'flush' the fluid when I bought the car (8 months ago). After seeing the crap that came out when I bled them today I am not sure they actually did anything. |
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| bdstone914 |
Dec 14 2021, 06:54 PM
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#2
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bdstone914 Group: Members Posts: 4,520 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(emerygt350 @ Dec 14 2021, 03:43 PM)  I just tried bleeding the brakes, I pulled up and cleaned and tried messing with the wires for the parking brake switch, nothing makes it stop flashing! Any ideas? Should I try the switch again now that I bled the brakes? This is one of the master cylinders without the little reset button. It's been flashing since I had a shop 'flush' the fluid when I bought the car (8 months ago). After seeing the crap that came out when I bled them today I am not sure they actually did anything. @emerygt350 Reset the switch on the master cylinder. When the pedal is pressed beyond the nornal range it trips the switch. There is a small pin in the center of the switch that needs to be pushed in. |
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| emerygt350 |
Dec 14 2021, 08:12 PM
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#3
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
This is the version without it. I wish I had a reset switch. I have the two wire version with a plastic divider between. Supposed to reset itself but not sure how that happens.
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| Van914 |
Dec 15 2021, 07:22 AM
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#4
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Van914 Group: Members Posts: 698 Joined: 5-January 03 From: Cincinnati, Ohio Member No.: 90 Region Association: Upper MidWest 
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Check to see if you have a switch under the parking brake handle. It could be bad or handle not turning it off.
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| emerygt350 |
Dec 15 2021, 09:31 AM
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#5
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(Van914 @ Dec 15 2021, 08:22 AM) Check to see if you have a switch under the parking brake handle. It could be bad or handle not turning it off. Yep. I just dug into that. No continuity between the wire on that switch and the prong on the gauge. Pulled the offending wire from the gauge and left the other one on. I assume that one heads to the master cylinder. I checked out the continuity on the master cylinder and there was none so that looks likes it's working fine. That e brake switch wire must be shorted somewhere. No more flashing light. Couldn't see it unless it was the darkest of dark nights anyway. Just knowing it was flashing got in my nerves though.  |
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| emerygt350 |
Dec 15 2021, 10:27 AM
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#6
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Hah! Now my e brake light works. So that must have been the master cylinder. Oh well. Not like I would even notice it unless it was pitch black out and my brakes failed.
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| Dave_Darling |
Dec 16 2021, 01:22 PM
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#7
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914 Idiot Group: Members Posts: 14,985 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Trust me, you'd notice if your brakes failed.... Especially at triple-digit speeds going into Turn 1 at Thunder Hill!
If your master cylinder switch does not have a reset button on it, someone may have grounded the brown/white wire that goes to it by mistake. That would keep the blinking light on. --DD |
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| emerygt350 |
Dec 16 2021, 02:12 PM
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#8
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(Dave_Darling @ Dec 16 2021, 02:22 PM) Trust me, you'd notice if your brakes failed.... Especially at triple-digit speeds going into Turn 1 at Thunder Hill! If your master cylinder switch does not have a reset button on it, someone may have grounded the brown/white wire that goes to it by mistake. That would keep the blinking light on. --DD Yeah,I would notice the brakes, just not the sad little light flashing... I will have to go digging for that wire. |
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