LagondaNet

AML_Canada · Joined: 22 Jul 2011 Posts: 15

Anyone sourced a replacement for the brake light switch mounted up high under the dash near the brake pedal pivot. It has 4 connections. One pair is normally connected and the other pair normally disconnected. When applied the connections become opposite.

jonc · Joined: 21 Sep 2010 Posts: 584 Location: Cheshire, UK

Does it have any markings on it? As far as I can tell, it is not a Lucas item, and the AM V8 had a pressure switch in the brake like for the lights.

There will be two sets of contacts because one set is needed for the cruise control cancel, something not on the V8.

I wonder if something like this would be a better replacement: http://www.flyingspares.com/shop/rolls-royce-spirit-spur-bentley-turbo-mulsanne/electrical/senders-transmitters/brake-switches/brake-light-cruise-control-switch-ud72267.html

The use of off-the-shelf microswitches would make it reliable, but also easy to fix.

Jonathan

AML_Canada · Joined: 22 Jul 2011 Posts: 15

Not a Lucas switch; did note the info down somewhere... Will post when I find it....

However, the RR dual microswitch you suggested is a FAR better replacement. I was actually thinking to fabricate something exactly like that!

Thank You! Smile

jonc · Joined: 21 Sep 2010 Posts: 584 Location: Cheshire, UK

great - let us know how you get on. I would still like to know the make of the original switch - maybe we can track it down.

jonc · Joined: 21 Sep 2010 Posts: 584 Location: Cheshire, UK

This looks like the nearest equivalent:

It is made by Standard Motor Products as an aftermarket replacement. Part no is SLS110. Alternative manufacturer: Sorensen SW-138. Compatibility seems to be listed as:

71-85 BUICK
70-85 CADILLAC
67-89 CHEVY
68-85 OLDSMOBILE

From different manufacturers I have seen it in black, grey and white plastic.

These are ten dollar commodity parts. Personally, I would use the Rolls-Royce alternative if I had to replace one.