The Ford Barn

cvicky · 07-20-2020, 09:35 PM

ive blown at least 3 in the last 4 yrs
again tonight brake lights don't work
swich is mounted on perportion valve on left inner fender

Lanny · 07-20-2020, 09:59 PM

Are you using Dot 3, 4 or 5 fluid ?

.

miker98038 · 07-20-2020, 11:36 PM

I've read that the Harley dealership will have a more modern switch that interchanges. Someone here will know the specifics.

cvicky · 07-21-2020, 07:27 AM

dot 3

Daddio · 07-21-2020, 08:05 AM

TBird suppliers (like Casco or Hills) offer a kit that replaces the pressure switch with a mechanical one. It operates off the brake pedal arm.

Lanny · 07-21-2020, 03:04 PM

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Quote:

Originally Posted by cvicky

dot 3

Sometimes, dot 5 (silicone) will cause the switch to malfunction.
But the switches can malfuntion for other reasons too.

i would put in a mechanical switch for more reliability.

.

Daves55Sedan · 07-21-2020, 05:47 PM

Don't buy anymore of those cheap chinese made brakelight switches. They are guaranteed to fail in short order. Both the seal inside and contacts are substandard. The cheat on everything.
I got a brakelight switch for my '55 from a motorcycle performance shop. It is set up to accept Dot 5 fluid, but I suppose you could still use Dot 3. It's been in there for years now and I get a lot of use out of it. You will need to do wiring terminal modifications to use the motorcycle switch, but it is the right pipe thread size and looks the same as the Dot 3 switch, except for the wiring.

paul2748 · 07-21-2020, 07:11 PM

On my 54, I made a bracket that mounted on the firewall brace that the brake and clutch pedal are mounted to and installed a mechanical switch off ebay. Has worked great for the last 8 or 9 years. I have a write up on it if interested.

Ford blue blood · 07-22-2020, 07:42 AM

The Harley switch is the way to go. Mine has been in for nearly 15 years now with no sign of failure.

Bob T · 07-22-2020, 06:52 PM

i used Harley Davidson brake light switch #72023-51E. No more problems

cvicky · 07-23-2020, 09:03 AM

they have a brake switch here in Ottawa at Harley dealership 72023-51E $27.
i'll try it thx
if that don't work i'm going mechanical

bobss396 · 07-29-2020, 08:03 AM

Painless Wiring makes one I've seen people use, it trips at low pressure. The one that came with my distribution block leaked immediately. The one from NAPA started out okay, but quickly took a lot of pressure for it to work. I now buy one on eBay that works fine, probably have 9000 miles on it. I carry a spare as well.

07-20-2020, 09:35 PM	#1
cvicky Senior Member Join Date: Jul 2018 Location: Ottawa, Ont Canada Posts: 161	pressure brake light switch ive blown at least 3 in the last 4 yrs again tonight brake lights don't work swich is mounted on perportion valve on left inner fender

07-20-2020, 09:59 PM	#2
Lanny Senior Member Join Date: May 2010 Location: Mn Posts: 2,411	Re: pressure brake light switch Are you using Dot 3, 4 or 5 fluid ? . __________________ If mama ain't happy, ain't nobody happy. But if daddy ain't happy...RUN

07-20-2020, 11:36 PM	#3
miker98038 Senior Member Join Date: Mar 2013 Location: Kent, WA. Tucson, AZ Posts: 1,397	Re: pressure brake light switch I've read that the Harley dealership will have a more modern switch that interchanges. Someone here will know the specifics.

07-21-2020, 07:27 AM	#4
cvicky Senior Member Join Date: Jul 2018 Location: Ottawa, Ont Canada Posts: 161	Re: pressure brake light switch dot 3

07-21-2020, 08:05 AM	#5
Daddio Member Join Date: Aug 2017 Location: Prince Edward County, So Ont Posts: 48	Re: pressure brake light switch TBird suppliers (like Casco or Hills) offer a kit that replaces the pressure switch with a mechanical one. It operates off the brake pedal arm.

07-21-2020, 05:47 PM	#7
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: pressure brake light switch Don't buy anymore of those cheap chinese made brakelight switches. They are guaranteed to fail in short order. Both the seal inside and contacts are substandard. The cheat on everything. I got a brakelight switch for my '55 from a motorcycle performance shop. It is set up to accept Dot 5 fluid, but I suppose you could still use Dot 3. It's been in there for years now and I get a lot of use out of it. You will need to do wiring terminal modifications to use the motorcycle switch, but it is the right pipe thread size and looks the same as the Dot 3 switch, except for the wiring.

07-21-2020, 07:11 PM	#8
paul2748 Senior Member Join Date: May 2010 Location: Midland Park, NJ Posts: 3,982	Re: pressure brake light switch On my 54, I made a bracket that mounted on the firewall brace that the brake and clutch pedal are mounted to and installed a mechanical switch off ebay. Has worked great for the last 8 or 9 years. I have a write up on it if interested. __________________ 48 Ford Conv 56 Tbird 54 Ford Victoria

07-22-2020, 07:42 AM	#9
Ford blue blood Senior Member Join Date: Jul 2011 Location: Birmingham, AL Posts: 814	Re: pressure brake light switch The Harley switch is the way to go. Mine has been in for nearly 15 years now with no sign of failure. __________________ Bill, certified Ford nut. 2016 F-150 2016 Focus 08 Shelby GT500 57 Ford Ranchero 36 Chevy, 351C/FMX, 8", Mustang II

07-22-2020, 06:52 PM	#10
Bob T Senior Member Join Date: May 2012 Location: Ontario, Canada Posts: 123	Re: pressure brake light switch i used Harley Davidson brake light switch #72023-51E. No more problems

07-23-2020, 09:03 AM	#11
cvicky Senior Member Join Date: Jul 2018 Location: Ottawa, Ont Canada Posts: 161	Re: pressure brake light switch they have a brake switch here in Ottawa at Harley dealership 72023-51E $27. i'll try it thx if that don't work i'm going mechanical

07-29-2020, 08:03 AM	#12
bobss396 Senior Member Join Date: Aug 2014 Posts: 721	Re: pressure brake light switch Painless Wiring makes one I've seen people use, it trips at low pressure. The one that came with my distribution block leaked immediately. The one from NAPA started out okay, but quickly took a lot of pressure for it to work. I now buy one on eBay that works fine, probably have 9000 miles on it. I carry a spare as well.