[TR] TR3 Turn Signal woes

CFM-TR cfmtr3a at verizon.net
Tue Jan 9 14:27:41 MST 2018

Thanks for the responses.  

I added bullet connectors in both Green/White (GW for RR signal) & Green/Red
(GR for LR signal) lines just before lamps 

Further investigation.  
With Lamps still connected 
When RR is disconnected (No ground/No Live), LR still flashes.
Reconnected RR and disconnected GR, LR does not flash.  
BUT - RR works as it should; Left Rear doesn't work when triggered at
Control Head.

Disconnected Lamps at bullet connectors; Used two test lamp circuits with
grounds connected to body:
With both test lamps connected, both flash the same as lamps.
With RR disconnected, test lamp connected to GR from wire harness, Test Lamp
In other words - no difference from original problem.

GR comes through wire harness from passenger side connections at RF Horn.
Checked GN from flasher to RF connection and it is doubled up with the GN
going to LF; GR is a dead-end at RF connection.

Not sure what to do next..  Suggestions?


1960 Triumph TR3


Tampa, FL




From: Dave [mailto:dave1massey at cs.com] 
Sent: Tuesday, January 9, 2018 7:58 AM
To: cfmtr3a at verizon.net; triumphs at autox.team.net
Subject: Re: [TR] TR3 Turn Signal woes


Since the front and rear lights work off the same wire and the fronts work I
would look at the ground connections at the rear, specifically the right
rear.  The wire may be inserted in the right place but is it making
connection?  Corrosion or a broken wire may be creating unintended current
paths leading to bizarre results such as this.

When the RR lamp flashes is it as bright as the LR when it flashes alone?
Is the LR brighter when you engage the left turn signal as when you engage
the right turn signal? 


Dave Massey

From: wbeech [mailto:wbeech at flash.net] 
Sent: Monday, January 8, 2018 11:22 PM
To: cfmtr3a at verizon.net; 'TR Triumphs' <triumphs at autox.team.net>
Subject: RE: [TR] TR3 Turn Signal woes


I have had issues like that before on my car and others.  Assuming a good
ground I would pull everything loose near the fixtures, including the
running and brake lights, and connect up one at a time and test each time I
made a connections.  As soon as something goes wrong, chase that wire back
through all the points to confirm that it is correct.  Don't assume that he
flasher and the connections inside the steering hub are good.


No easy answer, may 5 minutes, maybe 5 hours.


Good luck,




From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of CFM-TR
Sent: Monday, January 08, 2018 9:11 PM
To: 'TR Triumphs' <triumphs at autox.team.net <mailto:triumphs at autox.team.net>
Subject: [TR] TR3 Turn Signal woes


See attached diagram.


When I operate left turn on control head, front and rear operate as they

When I operate right turn on control, right front works but both lamps flash
in the rear.


Any ideas where the problem is?  I am at a complete loss.  I would think
that if I have right/left crossover, both lamps in the rear would flash
regardless of which indicator is used.  I checked connections at the rear
lamps and only a single line (correct one GR or GW) is connected.  Only line
going to right front is GW.  I have tried different connections at left
front since the GN and GR look so similar but nothing works then.  I checked
all four corners and live/ground wires are going to the correct terminals.


Any ideas appreciated.  Thanks


Carl Musson

1960 Triumph TR3


Tampa, FL



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/triumphs/attachments/20180109/da6c4328/attachment.html>

More information about the Triumphs mailing list