 75 Brake Warning Light, The brake warning light on the combo gauge is flashing |
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| dennisphelan |
 Jan 28 2019, 12:56 PM
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Newbie  Group: Members Posts: 15 Joined: 10-December 18 From: Dundee Oregon Member No.: 22,713 Region Association: Pacific Northwest  |
The large red brake warning light on the combo gauge is flashing. The emergency brake is disengaged. I checked the brake master cylinder and the one wire ( it only has one connection) that goes to it is attached. It appears I have some fluid leaking as the connection was wet with fluid. The car hasn't been driven in 12 years so I am sure many things could be wrong. What is the switch on the master cylinder sensing?
Thanks, Dennis Phelan |
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| Dave_Darling |
Jan 29 2019, 06:26 PM
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914 Idiot Group: Members Posts: 14,982 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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The light flashes when one of the brown/white wires that goes to it gets shorted to ground. The two wires go to the brake warning switch in the master cylinder, and to the button under the handbrake handle.
If the handbrake handle doesn't press the button under it down, the wire going there will be shorted to ground. If the switch in the master cylinder detects a massive loss of pressure (e.g., bleeding the brakes) it will close until the reset button in the switch is pressed. If one of the wires to those falls off and lays on the chassis, that can cause it to be shorted to ground. That will also make the light blink. But the most common thing is that you bled the brakes and didn't press the reset button on the master cylinder switch. --DD |
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Posts in this topic
dennisphelan 75 Brake Warning Light Jan 28 2019, 12:56 PM
914_teener
The large red brake warning light on the combo ga... Jan 28 2019, 01:47 PM
dennisphelan
The large red brake warning light on the combo g... Jan 30 2019, 02:27 PM
914_teener
The large red brake warning light on the combo g... Aug 14 2019, 09:56 AM Spoke The MC switch should have a small reset button on ... Jan 28 2019, 02:04 PM 914Sixer If you need a new switch let me know. Jan 29 2019, 11:02 AM 9fourteen14
If you need a new switch let me know.
Mark i... Aug 12 2019, 04:30 PM pvollma
The large red brake warning light on the combo ga... Jan 29 2019, 11:21 AM lierofox I wanna say the switch is a "low pressure lig... Jan 29 2019, 05:06 PM 914Sixer Here you go, used but good condition. Reset butto... Aug 13 2019, 10:27 AM jcd914 Disconnect the wire from the switch on the master ... Aug 14 2019, 01:50 AM |
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