Subject: Re: [TR] "More reliable" sidescreen brake pressure switch for DOT5/silicone?

From: David Templeton <[email-masked]>
Date: Mon, 8 Sep 2025 02:34:18 -0400

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Don,

I fabricated a bracket to attach to the brake pedal and install a standard
GM brake switch. The upside is that it allowed the adjustment of the
switch.  Then made a two-wire harness to the original pressure switch and
hooked it in parallel to the original connection.   It can easily be
removed and is well hidden.  I simply touch the brake pedal, and the lights
come on.

David

On Sun, Sep 7, 2025 at 10:29=E2=80=AFPM Don Hiscock <[email-masked]>=
 wrote:

> 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
>
> ** [email-masked] **
>
> Donate: http://www.team.net/donate.html
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--=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">Don,=C2=A0</div><div class=3D"gmail_default" style=3D"font-famil=
y:tahoma,sans-serif"><br></div><div class=3D"gmail_default" style=3D"font-f=
amily:tahoma,sans-serif">I fabricated a bracket=C2=A0to attach to the brake=
 pedal and install a standard GM brake switch. The upside=C2=A0is that it a=
llowed the adjustment of the switch.=C2=A0 Then made a two-wire harness=C2=
=A0to the original pressure switch and hooked it in parallel to the origina=
l connection.=C2=A0 =C2=A0It can easily be removed and is well hidden.=C2=
=A0 I simply touch the brake pedal, and the lights come on.=C2=A0 =C2=A0</d=
iv><div class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif"><br=
></div><div class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif"=
>David</div></div><br><div class=3D"gmail_quote gmail_quote_container"><div=
 dir=3D"ltr" class=3D"gmail_attr">On Sun, Sep 7, 2025 at 10:29=E2=80=AFPM D=
on Hiscock &lt;<a href=3D"mailto:[email-masked]">[email-masked]=
om</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">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" style=
=3D"font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-s=
ize:small">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 keep=
 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" style=3D"font-size:small"><br></div><div c=
lass=3D"gmail_default" style=3D"font-size:small">It was a nice day the othe=
r 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 four years last month=C2=
=A0that I&#39;ve owned this thing.</div><div class=3D"gmail_default" style=
=3D"font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-s=
ize:small"><a href=3D"https://photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzk=
vQRPj3kgscg4GSP4mLXMMpmfG2cqzZbBW4/X5/i-QRBNGvw-X5.jpg" target=3D"_blank">h=
ttps://photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMpm=
fG2cqzZbBW4/X5/i-QRBNGvw-X5.jpg</a></div><div class=3D"gmail_default" style=
=3D"font-size:small"><br></div></div>
** <a href=3D"mailto:[email-masked]" target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
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</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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From: DAVID MASSEY <[email-masked]>
Date: Mon, 8 Sep 2025 11:27:23 +0000 (UTC)

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I went the MGB route.=C2=A0 The brake light switch used on the early MGB re=
places the pedal stop on the pedal box as can be seen in the attached pictu=
re.
Dave=20

=20

    On Sunday, September 7, 2025 at 09:33:17 PM CDT, Don Hiscock <don.hisco=
[email-masked]> wrote:  =20

 I converted my TR3B to DOT5 three years ago.=C2=A0 I've been waiting for t=
he silicone oil to get into the=C2=A0pressure switch and cause it to quit w=
orking.=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"ydp8b7922a8yahoo-style-wrap" style=
=3D"font-family:Arial, Helvetica, sans-serif;font-size:16px;"><div><div dir=
=3D"ltr" data-setdir=3D"false">I went the MGB route.&nbsp; The brake light =
switch used on the early MGB replaces the pedal stop on the pedal box as ca=
n be seen in the attached picture.</div><div><br></div><div class=3D"ydp8b7=
922a8signature"><div style=3D"color: black; font-style: normal; font-size-a=
djust: none; font-weight: normal; font-stretch: normal; font-size: 12pt; li=
ne-height: normal; font-family: Arial, Helvetica, sans-serif;"><div style=
=3D"color: black; font-style: normal; font-size-adjust: none; font-weight: =
normal; font-stretch: normal; font-size: 12pt; line-height: normal; font-fa=
mily: Arial, Helvetica, sans-serif;"><div><font size=3D"4">Dave <br></font>=
</div><div><span style=3D"font-size:10.0pt;font-family:sans-serif;color:bla=
ck;"><br></span></div><br></div></div></div></div>
        <div><br></div><div><br></div>
       =20
        </div><div id=3D"ydp79a924b3yahoo_quoted_7891467656" class=3D"ydp79=
a924b3yahoo_quoted"><div class=3D"ydp79a924b3yahoo-style-wrap" style=3D"fon=
t-family:Arial, Helvetica, sans-serif;font-size:16px;">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div class=3D"ydp79a924b3quoted-text-header">
                        On Sunday, September 7, 2025 at 09:33:17 PM CDT, Do=
n Hiscock &lt;[email-masked]&gt; wrote:
                    </div>
                </div><div style=3D"font-family:'Helvetica Neue', Helvetica=
, Arial, sans-serif;font-size:13px;color:#26282a;border-left: 1px solid #cc=
c;padding-left: 8px;margin: 0px 0px 0px 8px" class=3D"ydp79a924b3inline_rep=
ly_quote_container" data-split-quote-node=3D"true">
                <div><br></div><div><br></div>
                <div><div id=3D"ydp79a924b3yiv4201813506"><div dir=3D"ltr">=
<div style=3D"font-size:small;" class=3D"ydp79a924b3yiv4201813506gmail_defa=
ult">I converted my TR3B to DOT5 three years ago.&nbsp; I've been waiting f=
or the silicone oil to get into the&nbsp;pressure switch and cause it to qu=
it working.&nbsp; That time is here.</div><div style=3D"font-size:small;" c=
lass=3D"ydp79a924b3yiv4201813506gmail_default"><br></div><div style=3D"font=
-size:small;" class=3D"ydp79a924b3yiv4201813506gmail_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 c=
an.&nbsp; Is any one supplier's or source's brake pressure switch any more =
reliable than the others around DOT5?</div><div style=3D"font-size:small;" =
class=3D"ydp79a924b3yiv4201813506gmail_default"><br></div><div style=3D"fon=
t-size:small;" class=3D"ydp79a924b3yiv4201813506gmail_default">It was a nic=
e day the other day, so the TR3B made the drive to the village&nbsp;mailbox=
es now that I"m living in northern New Mexico.&nbsp; Forty four years last =
month&nbsp;that I've owned this thing.</div><div style=3D"font-size:small;"=
 class=3D"ydp79a924b3yiv4201813506gmail_default"><br></div><div style=3D"fo=
nt-size:small;" class=3D"ydp79a924b3yiv4201813506gmail_default"><a href=3D"=
https://photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMp=
mfG2cqzZbBW4/X5/i-QRBNGvw-X5.jpg" rel=3D"nofollow" target=3D"_blank">https:=
//photos.smugmug.com/photos/i-QRBNGvw/0/KvPKhzkvQRPj3kgscg4GSP4mLXMMpmfG2cq=
zZbBW4/X5/i-QRBNGvw-X5.jpg</a></div><div style=3D"font-size:small;" class=
=3D"ydp79a924b3yiv4201813506gmail_default"><br></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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