[TR] Fuel gauge troubles

[David Friedlander]

Jim;

Can't say about a TR4 but, in my '74 TR6, when both the gas gauge and the
temp
gauge don't work, it's a loose fuse in the holder (both run off the same
fuse).
Check the fuse connections....

Dave



On Sun, Aug 18, 2019 at 11:40 AM Jim Henningsen <trguy75 at gmail.com> wrote:

> Thanks all for the feedback.  I’m heading out this afternoon for some
> tinkering.  I didn’t mention this since I didn’t think related, but the
> temp gauge is also not working, and didn’t realize it might be the voltage
> stabilizer unit.  Hmmmnn.
>
> Jim Henningsen
>
>
>
> *From:* Randall <tr3driver at ca.rr.com>
> *Sent:* Saturday, August 17, 2019 8:25 PM
> *To:* Jim Henningsen <trguy75 at gmail.com>; 'Triumphs' <
> triumphs at autox.team.net>
> *Subject:* RE: [TR] Fuel gauge troubles
>
>
>
> Quick and dirty test : Remove the wire from the sender, turn the key on,
> and ground the wire while watching the gauge.  If the gauge starts to climb
> towards full, then the gauge & wiring to it are probably OK.  Probably best
> to not leave it this way for long, but a few minutes won’t hurt.
>
>
>
> My next suspect (especially since it worked before restoration) would be
> the grounding for the sender.  IIRC the TR4 grounds the same as TR3,
> meaning not very well.  I like to add a ground wire from the stud on the
> sender to one of the tank mounting bolts.
>
>
>
> Use an ohmmeter to check the sender.  I don’t recall the exact numbers
> offhand, but it’s something like 100 ohms empty and 10 ohms full.  If it
> seems to work backwards (low resistance empty and high resistance full),
> you’ve got a TR3 sender instead of TR4.
>
>
>
> Also worth checking the temp gauge if the first test above doesn’t work.
> Do the same thing, pull the wire off the sender and ground it.  If temp
> gauge doesn’t respond either, it’s probably the voltage stabilizer.  Seems
> like maybe it’s mounted over in the passenger footwell on a TR4, but
> honestly I don’t recall for sure.
>
>
>
> -- Randall
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *Jim Henningsen <trguy75 at gmail.com>
> *Sent: *Saturday, August 17, 2019 6:54 PM
> *To: *'Triumphs' <triumphs at autox.team.net>
> *Subject: *[TR] Fuel gauge troubles
>
>
>
> Help, I'm calling the TR bat phone again.  Switching projects to get my car
>
> ready for AACC southeastern fall nationals on Mobile AL.  1962 TR4
> CT5212LO.
>
> Fuel gauge worked prior to restoration but not after.  Car is switched to
>
> neg ground.  Orig fuel sender float was sunk in tank.  Removed it and
>
> verified there is gas in it.  Hoping there is a way to rebuild it since
> orig
>
> part.  Put in a new sending unit from TRF this morning and added 7 gallons
>
> of gas and it still doesn't work but float rises.  The needle moved ever so
>
> slightly right above E then dropped back down with ignition on.  I even
> used
>
> a coat hanger to manually raise the float in the gas tank to "full" with
>
> ignition on but needle still didn't work.  Ignition in "On" position, but
>
> not running.
>
>
>
> My thoughts.
>
> 1. Bad gauge?
>
> 2. Wires reversed on fuel gauge from resto impacting since it is neg not
>
> original positive ground.  Running generator that has been polarized to neg
>
> ground.
>
> 3. connections at new sending unit not secure. Neg is to ground and
> positive
>
> to pos on sending unit
>
> 4. new sender bad
>
>
>
> Any thoughts on the possible easy fix before going through the list
>
> tomorrow.  Also, if anyone is looking for a nice 73 Stag with hardtop,
>
> manual tran, that has been owned by a TR owner of 60+ tyears and avid VTR
>
> member, it is for sale in Tally.  I am trying to help the family find a
> home
>
> for it.  Email me offline if you would like pics and contact info.
>
>
>
> Many thanks,
>
> Jim Henningsen
>
> Ocala, FL
>
> 60 TR3A
>
> 61 TR3A
>
> 62 TR4
>
> 75 TR6
>
>
>
>
>
> ** triumphs at autox.team.net **
>
>
>
> Donate: http://www.team.net/donate.html
>
> Archive: http://www.team.net/pipermail/triumphs
> http://www.team.net/archive
>
>
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/tr3driver@ca.rr.com
>
>
> ** triumphs at autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs
> http://www.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/forzion7@gmail.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/triumphs/attachments/20190818/04a043bb/attachment.html>