[TR] electrical issue

[DAVID MASSEY]

The TR6 definitely does.  And I recall reading that the TR3 had an issue where the tail lights were susceptible to damage from other cars,  being mounted so low, that the red wire could get grounded out and when the lights were switched on the harness would melt causing potential fire so the factor at some point put in an in-line fuse just for such an occurrence.
In fact, a quick Google search shows several sources indicating that fact and the location of the fuse (although the location varies from passenger footwell and under hood next to the voltage regulator.
But the fact remains that if the tail lights AND the dash lights are not working it is likely a common feed point interruption which could be a fuse or a dodgey bullet connector.
Dave 


 

    On Tuesday, April 21, 2026 at 05:21:07 PM CDT, dave northrup <dave at ranteer.com> wrote:   

 Correct me if I'm wrong - TRs never put fuses on light circuits

-------- Original message --------From: DAVID MASSEY <dave1massey at cs.com> Date: 4/21/26 4:49 PM (GMT-06:00) To: Tony Drews <tony at tonydrews.com>, triumphs at autox.team.net, "auprichard uprichard.net" <auprichard at uprichard.net>Subject: Re: [TR] electrical issue 
Good point.  it wouldn't.  But the information offered was a bit sparce.  Is it just the tail lights and do the brake turn signal lights work?
I believe there is a fuse for those lights somewhere in the harness.  It was a dealer upgrade at some point.  Later TR's have a fuse in the fuse block for that.
Dave 




On Tuesday, April 21, 2026 at 10:40:26 AM CDT, auprichard uprichard.net <auprichard at uprichard.net> wrote:


But how would bad grounds affect the dash lights?

 

From: Triumphs <triumphs-bounces at autox.team.net>On Behalf Of Tony Drews
Sent: Monday, April 20, 2026 10:05 PM
To: triumphs at autox.team.net
Subject: Re: [TR] electrical issue

 

I'd check grounds too - if the lights are grounded to the body and the body was painted they may no longer be grounded. Regards, Tony On 4/20/2026 5:38 PM, auprichard uprichard.net wrote: ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍



I'd check grounds too - if the lights are grounded to the body and the body was painted they may no longer be grounded.

Regards, Tony

On 4/20/2026 5:38 PM, auprichard uprichard.net wrote:


Yes – same circuit.  But I’d also expect the front side lights / running lights not to be working and possibly the headlights too.

 

Get under the dash and check the wires in and out of the light switch.

 

From: Triumphs<triumphs-bounces at autox.team.net> On Behalf Of Allan Stults
Sent: Monday, April 20, 2026 4:17 PM
To: triumphs at autox.team.net
Subject: [TR] electrical issue

 

I have a '62 TR 3B. I recently had it painted. The painter took it apart to paint (fenders, doors, trunk, etc.). After bringing it home, I discovered that the tail lights and dash lights were not working. All other electrical items are working.

I have a '62 TR 3B.  I recently had it painted.  The painter took it apart to paint (fenders, doors, trunk, etc.).  After bringing it home, I discovered that the tail lights and dash lights were not working.  All other electrical items are working.  Are those 2 items, dash and tail lights on the same circuit?  Everything was working before the paint job.

 

Thanks in advance for any help,

 

Allan Stults

Veneta, Oregon




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