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I must admit a little confusion.=C2=A0 I know they made a change in gauge =
styles between the TR3 and TR4 but this is an early (very early) TR4 and it=
may have a TR3-style gauge.=C2=A0 Bit then they never used an electric tem=
p gauge on the TR3.
That said, IF it is a later style gauge a shorted sensor wire would cause a=
full scale indication on the gauge.=C2=A0 The common test is to unplug the=
wire from the sender and see if the gauge behaves differently.=20
=20
Dave=20
=20
=20
-----Original Message-----
From: greg <greg@gelhar.com>
To: Jim Henningsen <trguy75@gmail.com>; 'Triumphs' <triumphs@autox.team.net=
>
Sent: Sun, Sep 29, 2019 9:11 pm
Subject: Re: [TR] 62 TR4 Temp Gauge
I have cosmetically restored many gauges from all models of Triumph cars. A=
ll of the bimetallic small gauges draw 75mA at half scale. 120 MA puts the =
needle at the top mark and 150 mA pegs the needle to max.
The bimetallic gauges are purely resistive and only full battery voltage wo=
uld cause the needle to peg on start up. I can not see where any gauge defe=
ct would create the symptoms you describe.
Perhaps others can share an idea why you are seeing what you describe.
Greg G.
On Sep 29, 2019 6:06 PM, Jim Henningsen <trguy75@gmail.com> wrote:
>
> Question.=C2=A0 I am still having a challenge with the electric temperatu=
re gauge=20
> on my 62 TR4.=C2=A0 I am now thinking it might be a bad gauge.=C2=A0 As s=
oon as I=20
> start running the engine the temp gauge pegs to max.=C2=A0 I know by the =
laser=20
> temp gun I have that it is not running above 165 on the coolant in the=20
> radiator.=C2=A0 I swapped the original voltage stabilizer for a new neg g=
round=20
> one and it still does the same thing.=C2=A0 I replaced the temp sending u=
nit and=20
> no change.=C2=A0 Bad gauge?=C2=A0 It worked a few years back in 2012 befo=
re I took the=20
> car off the road for a restoration.=C2=A0 Does Nisonger rebuild these sma=
ller=20
> gauges?=C2=A0=20
> Thoughts would be greatly appreciated.=C2=A0=20
> Jim Henningsen=20
> Ocala FL=20
> 60 TR3A=20
> 61 TR3A=20
> 62 TR4=20
> 75 TR6=20
> 82 Jeep CJ8=20
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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">I must admit a little confusion. I know they made a
change in gauge styles between the TR3 and TR4 but this is an early (very
early) TR4 and it may have a TR3-style gauge. Bit then they never used an
electric temp gauge on the TR3.</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">That said, IF it is a later style gauge a shorted sensor
wire would cause a full scale indication on the gauge. The common test is
to unplug the wire from the sender and see if the gauge behaves differently.
</font><br>
</div>
<div> <br>
</div>
<div style="clear:both"><font size="4">Dave </font><br>
<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: greg <greg@gelhar.com><br>
To: Jim Henningsen <trguy75@gmail.com>; 'Triumphs'
<triumphs@autox.team.net><br>
Sent: Sun, Sep 29, 2019 9:11 pm<br>
Subject: Re: [TR] 62 TR4 Temp Gauge<br>
<br>
<div dir="ltr">I have cosmetically restored many gauges from all models of
Triumph cars. All of the bimetallic small gauges draw 75mA at half scale. 120
MA puts the needle at the top mark and 150 mA pegs the needle to max.<br>
</div>
<div dir="ltr">The bimetallic gauges are purely resistive and only full battery
voltage would cause the needle to peg on start up. I can not see where any
gauge defect would create the symptoms you describe.<br>
</div>
<div dir="ltr">Perhaps others can share an idea why you are seeing what you
describe.<br>
</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Greg G.<br>
</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">On Sep 29, 2019 6:06 PM, Jim Henningsen <<a
ymailto="mailto:trguy75@gmail.com"; rel="noopener noreferrer"
removedlink__3388b1f8-ebd5-4d65-bdab-106179038774__href="mailto:trguy75@gmail.com";>trguy75@gmail.com</a>>
wrote:<br>
</div>
<div dir="ltr">><br>
</div>
<div dir="ltr">> Question. I am still having a challenge with the
electric temperature gauge <br>
</div>
<div dir="ltr">> on my 62 TR4. I am now thinking it might be a bad
gauge. As soon as I <br>
</div>
<div dir="ltr">> start running the engine the temp gauge pegs to max.
I know by the laser <br>
</div>
<div dir="ltr">> temp gun I have that it is not running above 165 on the
coolant in the <br>
</div>
<div dir="ltr">> radiator. I swapped the original voltage stabilizer
for a new neg ground <br>
</div>
<div dir="ltr">> one and it still does the same thing. I replaced the
temp sending unit and <br>
</div>
<div dir="ltr">> no change. Bad gauge? It worked a few years
back in 2012 before I took the <br>
</div>
<div dir="ltr">> car off the road for a restoration. Does Nisonger
rebuild these smaller <br>
</div>
<div dir="ltr">> gauges? <br>
</div>
<div dir="ltr">> Thoughts would be greatly appreciated. <br>
</div>
<div dir="ltr">> Jim Henningsen <br>
</div>
<div dir="ltr">> Ocala FL <br>
</div>
<div dir="ltr">> 60 TR3A <br>
</div>
<div dir="ltr">> 61 TR3A <br>
</div>
<div dir="ltr">> 62 TR4 <br>
</div>
<div dir="ltr">> 75 TR6 <br>
</div>
<div dir="ltr">> 82 Jeep CJ8 <br>
</div>
<br>
</div>
</div>
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