Subject: Re: [TR] DOT5 & brake pressure switch

From: Frank Fisher <[email-masked]>
Date: Tue, 9 Sep 2025 11:09:31 +0000 (UTC)

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 my experiance is the same as below.
Frank
    On Monday, September 8, 2025 at 06:09:58 PM PDT, aribert neumann <aribe=
[email-masked]> wrote: =20
=20
 I don't have any knowledge of a TR3B=C2=A0 =C2=A0(I drove my Spit6 today, =
50 mile round trip, plan to do the same tomorrow).=C2=A0 =C2=A0=C2=A0
I converted my '61 Ford Falcon to DOT5 about 25 yrs ago.=C2=A0 I have also =
experienced the much shorter (hydraulic) switch life with DOT5.=C2=A0 =C2=
=A0I tap the brakes prior to opening the garage door to check for brake lig=
ht function on any of my vehicles before departing home.=C2=A0 =C2=A0With t=
he hydraulic brake switch using DOT5, first the brake pedal displacement an=
d then the braking effort (to activate the brake lights) will increase as t=
he switch begins to fail.=C2=A0 I expect to replace the switch up to twice =
a year - I drive the car 8 months out of the year.=C2=A0 =C2=A0I am willing=
 to replace switches rather than cut into the harness.=C2=A0 =C2=A0I replac=
e the switch without needing to do any brake bleeding.
I buy a half dozen switches at a time from RockAuto.=C2=A0 =C2=A0The switch=
 for my Ford is Standard Parts SLS27, the switch has two round pins to enga=
ge the harness.=C2=A0 In the past decade there is now a slip of paper in th=
e switch box warning me not to use DOT5.

------- Forwarded message ----------
From:=C2=A0Don Hiscock <[email-masked]>
To:=C2=A0Triumphs list <[email-masked]>
Cc:=C2=A0
Bcc:=C2=A0
Date:=C2=A0Sun, 7 Sep 2025 20:08:21 -0600
Subject:=C2=A0[TR] "More reliable" sidescreen brake pressure switch for DOT=
5/silicone?
I converted my TR3B to DOT5 three years ago.=C2=A0 I've been waiting for th=
e silicone oil to get into the=C2=A0pressure switch and cause it to quit wo=
rking.=C2=A0 That time is here.
Yes, I could convert to a TR6 mechanical switch actuated by the brake pedal=
 lever.=C2=A0 I may end up there.=C2=A0 But it's fun to keep this car as or=
iginal as I can.=C2=A0 Is any one supplier's or source's brake pressure swi=
tch any more reliable than the others around DOT5?
It was a nice day the other day, so the TR3B made the drive to the village=
=C2=A0mailboxes now that I"m living in northern New Mexico.=C2=A0 Forty fou=
r years last month=C2=A0that I've owned this thing.
https://photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMp=
mfG2cqzZbBW4/X5/i-QRBNGvw-X5.jpg** [email-masked] **

Archive: http://www.team.net/pipermail/triumphs=C2=A0 http://www.team.net/a=
rchive

[email-masked]
 =20
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<html><head></head><body><div class=3D"ydpce1c7f69yahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px=
;"><div></div>
        <div dir=3D"ltr" data-setdir=3D"false">my experiance is the same as=
 below.</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"l=
tr" data-setdir=3D"false">Frank</div><div><br></div>
       =20
        </div><div id=3D"ydp60d15f44yahoo_quoted_8113304829" class=3D"ydp60=
d15f44yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                        On Monday, September 8, 2025 at 06:09:58 PM PDT, ar=
ibert neumann &lt;[email-masked]&gt; wrote:
                    </div>
                    <div><br></div>
                    <div><br></div>
               =20
               =20
                <div><div id=3D"ydp60d15f44yiv1777866880"><div dir=3D"ltr">=
I don't have any knowledge of a TR3B&nbsp; &nbsp;(I drove my Spit6 today, 5=
0 mile round trip, plan to do the same tomorrow).&nbsp; &nbsp;&nbsp;<div><b=
r></div><div>I converted my '61 Ford Falcon to DOT5 about 25 yrs ago.&nbsp;=
 I have also experienced the much shorter (hydraulic) switch life with DOT5=
.&nbsp; &nbsp;I tap the brakes prior to opening the garage door to check fo=
r brake light function on any of my vehicles before departing home.&nbsp; &=
nbsp;With the hydraulic brake switch using DOT5, first the brake pedal disp=
lacement and then the braking effort (to activate the brake lights) will in=
crease as the switch begins to fail.&nbsp; I expect to replace the switch u=
p to twice a year - I drive the car 8 months out of the year.&nbsp; &nbsp;I=
 am willing to replace switches rather than cut into the harness.&nbsp; &nb=
sp;I replace the switch without needing to do any brake bleeding.</div><div=
><br></div><div>I buy a half dozen switches at a time from RockAuto.&nbsp; =
&nbsp;The switch for my Ford is Standard Parts SLS27, the switch has two ro=
und pins to engage the harness.&nbsp; In the past decade there is now a sli=
p of paper in the switch box warning me not to use DOT5.</div><div><div><br=
></div><div><br></div><div><br></div><div>------- Forwarded message -------=
---<br>From:&nbsp;Don Hiscock &lt;<a href=3D"mailto:[email-masked]" =
rel=3D"nofollow" target=3D"_blank">[email-masked]</a>&gt;<br>To:&nbs=
p;Triumphs list &lt;<a href=3D"mailto:[email-masked]" rel=3D"nofol=
low" target=3D"_blank">[email-masked]</a>&gt;<br>Cc:&nbsp;<br>Bcc:=
&nbsp;<br>Date:&nbsp;Sun, 7 Sep 2025 20:08:21 -0600<br>Subject:&nbsp;[TR] "=
More reliable" sidescreen brake pressure switch for DOT5/silicone?<br><div =
dir=3D"ltr"><div class=3D"ydp60d15f44yiv1777866880gmail_default">I converte=
d my TR3B to DOT5 three years ago.&nbsp; I've been waiting for the silicone=
 oil to get into the&nbsp;pressure switch and cause it to quit working.&nbs=
p; That time is here.</div><div class=3D"ydp60d15f44yiv1777866880gmail_defa=
ult"><br></div><div class=3D"ydp60d15f44yiv1777866880gmail_default">Yes, I =
could convert to a TR6 mechanical switch actuated by the brake pedal lever.=
&nbsp; I may end up there.&nbsp; But it's fun to keep this car as original =
as I can.&nbsp; Is any one supplier's or source's brake pressure switch any=
 more reliable than the others around DOT5?</div><div class=3D"ydp60d15f44y=
iv1777866880gmail_default"><br></div><div class=3D"ydp60d15f44yiv1777866880=
gmail_default">It was a nice day the other day, so the TR3B made the drive =
to the village&nbsp;mailboxes now that I"m living in northern New Mexico.&n=
bsp; Forty four years last month&nbsp;that I've owned this thing.</div><div=
 class=3D"ydp60d15f44yiv1777866880gmail_default"><br></div><div class=3D"yd=
p60d15f44yiv1777866880gmail_default"><a href=3D"https://photos.smugmug.com/=
photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMpmfG2cqzZbBW4/X5/i-QRBNGvw-X=
5.jpg" rel=3D"nofollow" target=3D"_blank">https://photos.smugmug.com/photos=
/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMpmfG2cqzZbBW4/X5/i-QRBNGvw-X5.jpg<=
/a></div></div></div></div></div>
</div>** <a href=3D"mailto:[email-masked]" rel=3D"nofollow" target=
=3D"_blank">[email-masked]</a> **<br><br>Donate: <a href=3D"http:/=
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tions/triumphs/[email-masked]</a><br></div>
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Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive

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---

From: David Templeton <[email-masked]>
Date: Tue, 9 Sep 2025 08:44:34 -0400

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For those interested, this is how I did mine.   I made a bracket
25years ago :-)   And it is still holding up just fine.  And the switch, as
I said, a generic long thread brake switch.  I think I paid $15cdn when I
replaced it 6years ago.  The green wires are then ran along other harnesses
to hook into the pressure switch on the passenger frame

David

On Mon, Sep 8, 2025 at 9:08=E2=80=AFPM aribert neumann <[email-masked]>=
 wrote:

> I don't have any knowledge of a TR3B   (I drove my Spit6 today, 50 mile
> round trip, plan to do the same tomorrow).
>
> I converted my '61 Ford Falcon to DOT5 about 25 yrs ago.  I have also
> experienced the much shorter (hydraulic) switch life with DOT5.   I tap t=
he
> brakes prior to opening the garage door to check for brake light function
> on any of my vehicles before departing home.   With the hydraulic brake
> switch using DOT5, first the brake pedal displacement and then the brakin=
g
> effort (to activate the brake lights) will increase as the switch begins =
to
> fail.  I expect to replace the switch up to twice a year - I drive the ca=
r
> 8 months out of the year.   I am willing to replace switches rather than
> cut into the harness.   I replace the switch without needing to do any
> brake bleeding.
>
> I buy a half dozen switches at a time from RockAuto.   The switch for my
> Ford is Standard Parts SLS27, the switch has two round pins to engage the
> harness.  In the past decade there is now a slip of paper in the switch b=
ox
> warning me not to use DOT5.
>
>
>
> From: Don Hiscock <[email-masked]>
> To: Triumphs list <[email-masked]>
> Cc:
> Bcc:
> Date: Sun, 7 Sep 2025 20:08:21 -0600
> Subject: [TR] "More reliable" sidescreen brake pressure switch for
> DOT5/silicone?
> I converted my TR3B to DOT5 three years ago.  I've been waiting for the
> silicone oil to get into the pressure switch and cause it to quit working=
.
> That time is here.
>
> Yes, I could convert to a TR6 mechanical switch actuated by the brake
> pedal lever.  I may end up there.  But it's fun to keep this car as
> original as I can.  Is any one supplier's or source's brake pressure swit=
ch
> any more reliable than the others around DOT5?
>
> It was a nice day the other day, so the TR3B made the drive to the
> village mailboxes now that I"m living in northern New Mexico.  Forty four
> years last month that I've owned this thing.
>
>
> https://photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXM=
MpmfG2cqzZbBW4/X5/i-QRBNGvw-X5.jpg
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/[email-masked]
>

--=20
Regards
David Templeton
Ontario, Canada
1959 TR3a TS54226L
1974 Spitsix FM10491L

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:tahoma,s=
ans-serif">For those interested, this is how I did mine.=C2=A0 =C2=A0I made=
 a bracket 25years=C2=A0ago :-)=C2=A0 =C2=A0And it is still holding up just=
 fine.=C2=A0 And the switch, as I said, a generic long thread brake switch.=
=C2=A0 I think I paid $15cdn when I replaced it 6years ago.=C2=A0 The green=
 wires are then ran along other harnesses to hook into the pressure switch =
on the passenger frame</div><div class=3D"gmail_default" style=3D"font-fami=
ly:tahoma,sans-serif"><br></div><div class=3D"gmail_default" style=3D"font-=
family:tahoma,sans-serif">David=C2=A0=C2=A0</div><div class=3D"gmail_defaul=
t" style=3D"font-family:tahoma,sans-serif"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:tahoma,sans-serif"><img src=3D"cid:ii_mfcjkem30=
" alt=3D"20250909_074519.jpg" width=3D"563" height=3D"253"><br></div><img s=
rc=3D"cid:ii_mfcjkem71" alt=3D"20250909_074538.jpg" width=3D"563" height=3D=
"253"><img src=3D"cid:ii_mfcjkem82" alt=3D"20250909_074545.jpg" width=3D"56=
3" height=3D"253"><br></div><br><div class=3D"gmail_quote gmail_quote_conta=
iner"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 8, 2025 at 9:08=E2=
=80=AFPM aribert neumann &lt;<a href=3D"mailto:[email-masked]">aribertn=
@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex"><div dir=3D"ltr">I don&#39;t have any knowledge of a TR3B=C2=A0 =
=C2=A0(I drove my Spit6 today, 50 mile round trip, plan to do the same tomo=
rrow).=C2=A0 =C2=A0=C2=A0<div><br></div><div>I converted my &#39;61 Ford Fa=
lcon to DOT5 about 25 yrs ago.=C2=A0 I have also experienced the much short=
er (hydraulic) switch life with DOT5.=C2=A0 =C2=A0I tap the brakes prior to=
 opening the garage door to check for brake light function on any of my veh=
icles before departing home.=C2=A0 =C2=A0With the hydraulic brake switch us=
ing DOT5, first the brake pedal displacement and then the braking effort (t=
o activate the brake lights) will increase as the switch begins to fail.=C2=
=A0 I expect to replace the switch up to twice a year - I drive the car 8 m=
onths out of the year.=C2=A0 =C2=A0I am willing to replace switches rather =
than cut into the harness.=C2=A0 =C2=A0I replace the switch without needing=
 to do any brake bleeding.</div><div><br></div><div>I buy a half dozen swit=
ches at a time from RockAuto.=C2=A0 =C2=A0The switch for my Ford is Standar=
d Parts SLS27, the switch has two round pins to engage the harness.=C2=A0 I=
n the past decade there is now a slip of paper in the switch box warning me=
 not to use DOT5.</div><div><div><br></div><div><br></div><div><br></div><d=
iv>------- Forwarded message ----------<br>From:=C2=A0Don Hiscock &lt;<a hr=
ef=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
</a>&gt;<br>To:=C2=A0Triumphs list &lt;<a href=3D"mailto:[email-masked]=
m.net" target=3D"_blank">[email-masked]</a>&gt;<br>Cc:=C2=A0<br>Bc=
c:=C2=A0<br>Date:=C2=A0Sun, 7 Sep 2025 20:08:21 -0600<br>Subject:=C2=A0[TR]=
 &quot;More reliable&quot; sidescreen brake pressure switch for DOT5/silico=
ne?<br><div dir=3D"ltr"><div class=3D"gmail_default">I converted my TR3B to=
 DOT5 three years ago.=C2=A0 I&#39;ve been waiting for the silicone oil to =
get into the=C2=A0pressure switch and cause it to quit working.=C2=A0 That =
time is here.</div><div class=3D"gmail_default"><br></div><div class=3D"gma=
il_default">Yes, I could convert to a TR6 mechanical switch actuated by the=
 brake pedal lever.=C2=A0 I may end up there.=C2=A0 But it&#39;s fun to kee=
p this car as original as I can.=C2=A0 Is any one supplier&#39;s or source&=
#39;s brake pressure switch any more reliable than the others around DOT5?<=
/div><div class=3D"gmail_default"><br></div><div class=3D"gmail_default">It=
 was a nice day the other day, so the TR3B made the drive to the village=C2=
=A0mailboxes now that I&quot;m living in northern New Mexico.=C2=A0 Forty f=
our years last month=C2=A0that I&#39;ve owned this thing.</div><div class=
=3D"gmail_default"><br></div><div class=3D"gmail_default"><a href=3D"https:=
//photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMpmfG2cq=
zZbBW4/X5/i-QRBNGvw-X5.jpg" target=3D"_blank">https://photos.smugmug.com/ph=
otos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMpmfG2cqzZbBW4/X5/i-QRBNGvw-X5.=
jpg</a></div></div></div></div></div>
** <a href=3D"mailto:[email-masked]" target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
<br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
er" target=3D"_blank">http://www.team.net/pipermail/triumphs</a>=C2=A0 <a h=
ref=3D"http://www.team.net/archive" rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/archive</a><br>
<br>
hs/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://au=
tox.team.net/mailman/options/triumphs/[email-masked]</a><br>
</blockquote></div><div><br clear=3D"all"></div><div><br></div><span class=
=3D"gmail_signature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_s=
ignature"><div dir=3D"ltr"><div><div dir=3D"ltr"><font face=3D"tahoma, sans=
-serif">Regards</font><div><font face=3D"tahoma, sans-serif">David Templeto=
n</font></div><div><font face=3D"tahoma, sans-serif">Ontario, Canada</font>=
</div><div><font face=3D"tahoma, sans-serif">1959 TR3a=C2=A0TS54226L</font>=
</div><div><font face=3D"tahoma, sans-serif">1974 Spitsix=C2=A0<span style=
=3D"color:rgb(84,84,84)">FM10491L</span></font></div></div></div></div></di=
v>

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