55-57 t-birds brake light switch | Ford Thunderbird forum club group 1955-2005 models

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55-57 t-birds brake light switch

  • Thread starter Thread starter ron56
  • Start date Start date
ron56

ron56

Bronze Member
Reaction score
38
Thunderbird Year
1956
Hi, I converted my 56 bird to DOT 5 silicone brake fluid. After about one year I notice my brake lights (bad switch) weren't working so I ordered a Standard SLS27 which looked to be a replacement for the original. When I opened the new box I found a note that stated "This product is not approved for use with silicone brake fluids."
Does anyone have a part number that will work and is compatible with silicone. If not I guess I will need to go the mechanical route.

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Go mechanical or go back to Dot 3. This is a common issue with with DOT 5
 
I went mechanical. No regrets at all. Simple installation. Bought it from CASCO Classic Thunderbird parts for $32.
 
Ron Francis makes quality electrical components and has a low pressure brake switch that is compatible with silicone brake fluid.
Part number is SW-30, I installed one and have not had any issues. Summit sells them.
 
I switched to DOT 5 brake fluid over 20 years ago in both my 57 T-Bird and and 66 Mustang and have never had a problem with the brake light switches. I really like the DOT 5 due to it's non hydroscopic property .
 
Thanks to CSPIDY for the brake switch info. One small correction the part number is SW-32. For a 80 year old body it was far easier to change out the switch vs trying to get under the dash to install the mechanical version. I missed the best opportunity back a few months ago when I had the dash out after painting. The
SW-32 switch comes with a new connector and terminals. The cost was $31 about the same cost of the mechanical switch.
 
Glad it work out for you, it’s a shame that with all of the modern technology today most electrical repo switches aren’t worth the box they are shipped in.
 
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