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Brake light switch removal....Tips?

 
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maddhatter1  



Joined: 20 Jul 2010
Posts: 19
Location: New Jersey

PostPosted: Tue Mar 08, 2011 7:52 am    Post subject: Brake light switch removal....Tips? Reply with quote

I need to replace one of the brake light switches on my 77 and looking at it I see there is not much room to operate there, let alone get a wrench into. Do I have to remove the master cylinder to remove this or is there an easier way to do this without removing lots of things that I am not seeing? Thanks in advance.







Steve
77 924
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maddhatter1  



Joined: 20 Jul 2010
Posts: 19
Location: New Jersey

PostPosted: Tue Mar 08, 2011 8:36 am    Post subject: Reply with quote

Ok, I need to update this a little more after doing a little investigation. I was referring to the brake light pressure switches that attach to the master cylinder. I thought that this was where the switch was located because when I looked in the usual spot on the pedal, there was no switch at all. So I was thinking that maybe the pressure switches work the lights alone and there is no switch on the brake pedal on this year. I see the bracket where I would assume the switch would be, but nothing is there....just empty holes in the bracket. So I guess my question is.....is there actually supposed to be a switch assembly on the pedal on the 77 model or does the pressure switch do all the triggering?
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!tom  



Joined: 28 Aug 2006
Posts: 1912
Location: Victoria, BC Canada

PostPosted: Tue Mar 08, 2011 10:47 am    Post subject: Reply with quote

There are indeed two brake light pressure switches on the master cylinder of your model year car. If one activates and the other doesn't, this signals the brake warning light on the dash. They are also used to light the brake lights on the car.

Later models use a switch on the pedal using the mounts you found; there were many future upgrades designed into the car from the beginning.

I've never tried to remove the switches with the master cylinder installed. Like pretty much everywhere on the car, big hands can be a disadvantage.
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maddhatter1  



Joined: 20 Jul 2010
Posts: 19
Location: New Jersey

PostPosted: Tue Mar 08, 2011 12:48 pm    Post subject: Reply with quote

Thanks, now I don't feel so stupid. Strange that the local auto parts place had a listing for a brake light switch for this year, but its not the pressure switch.
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nikobbell  



Joined: 29 Nov 2017
Posts: 21
Location: chicago, illinois

PostPosted: Wed Mar 14, 2018 10:56 pm    Post subject: Reply with quote

I know this post is old but putting this in in case anyone down the road finds it helpful. I just changed the two brake light switches without taking off the master cylinder. I just used a wrench with a short handle. The steel brake lines are in the way but with a little maneuvering it can be done. Finicky but i managed to get them both in in about 20 minutes. Make sure you have the new one in hand and ready when you take the old one off so you don't lose too much brake fluid
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1978 bmw 633csi euro
1981 bmw 635csi euro m90
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