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Old 12-25-2005, 11:07 AM
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brake light on in instrumen pael after repairs.

Hi guys! Need your help: Sequense of events:. 1977 450SL, passenger side brake in front pulled to right, brake light went on. Pulled drivers side wheel, caliper on wheel leaking slightly. Replaced with rebuilt calipers,(both sides) refaced front discs, new rubber brake lines, new front sensors. pads OK, Everything OK, firm brake,. 2 days later brake light back on instrument panel. Brakes feel firm.. master cylinder possible overfilled? sensor lines? Car brakes fine. your assistance appreciated. Abe G
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Old 12-25-2005, 11:58 AM
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...possibly under- filled due to bleeding brakes.
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Old 12-25-2005, 12:11 PM
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If the bottle on the master cylinder has enough oil then i guess it might be a nonworking buoy (the buoy is to indecate the oil low level). I called it a buoy because I don't know it's name : )).. Good Luck.
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Old 12-25-2005, 04:06 PM
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Re: brake light on after repairs 1977 450sl

Thanks for replies.However brake fluid is to top of master cylinder. Please advise. Thanks again, Abe G
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Old 12-25-2005, 04:16 PM
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Pad sensor wire grounding.....
Emergency Brake not all the way Off.....
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Old 12-26-2005, 11:53 AM
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to Arthur Dalton re brakelight

Dear Arthur: Raining cats and dogs, will check when stops. Thank you again for your always good advice. Drained excess from master cylinder light still on. Sensor short and emergency brake next? Merry Christmas and Happy New Year to all! Abe G (Happy Hannukah also)
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Old 12-26-2005, 02:52 PM
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Quote:
Originally Posted by abe g
Dear Arthur: Raining cats and dogs, will check when stops. Thank you again for your always good advice. Drained excess from master cylinder light still on. Sensor short and emergency brake next? Merry Christmas and Happy New Year to all! Abe G (Happy Hannukah also)

there is usually a pressure sensor on the front of the master cylinder that has a single wire going to it, if it detects un equal pressure it will trigger, turning on the light, you must press the rubber part in to reset it after repairs, this should turn the light off if youy model has this feature.

Last edited by carson356; 12-26-2005 at 03:20 PM.
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Old 12-26-2005, 03:04 PM
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Quote:
Originally Posted by zcc
(the buoy is to indecate the oil low level). I called it a buoy because I don't know it's name : )).. Good Luck.
FLOAT


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