• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

TR2/3/3A TR3 Turn Signal question...

Brooklands

Yoda
Silver
Country flag
Offline
First off, when the previous owner modified the steering, he added a three way toggle switch on the dash for the turn signals. Once I got used to always turning them off manually all was well until last week when I noticed on a drive that I had no flashing light on the dash when the turn signals were on. When I got home I checked and I get one clicking sound on the first left turn flash as well as one flash on the dash, and then no more clicks or dash lights on subsequent flashes, but the left turn signals keep on flashing properly. There is no sign on the dash and no clicks when I flip on the right signals. The right rear flashes at double time and the right front signal does not work. I tried changing the front right bulb but that did not fix anything.
Is it the relay?
I thought I had one with a broken mounting bracket, but I seem to have tossed it when cleaning the garage, so I could not check to see if that fixed it.
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Dave - I've found that issues like this are usually related to poor grounding. Check that first.

G'luck!
Mickey
 
OP
Brooklands

Brooklands

Yoda
Silver
Country flag
Offline
The two ground wires I found in this circuit seem to be solid. The right front light does turn on with the "side" lights switch but not with the turn signals. I probably could be missing other ground wires in the circuit...
 

TR3driver

Great Pumpkin - R.I.P
Offline
Kind of sounds like two separate problems to me. I would work on getting the RF bulb working first, and then worry about why the dash light doesn't work.

My next step would be to remove the RF bulb, and carefully probe the socket terminals with a voltmeter or DMM, while the right turn signals are on. From the socket to one pin should give nothing, but socket to the other pin should show 12v flashing (in time with the rear signal). If not, there is a wiring problem to the socket. Back up to where the subharness joins the main harness (and the body ground) and check again.

If you do see the 12v flashing at the socket, then remove the socket from the grille and pull it out of the rubber boot (leaving the wires connected. Insert the bulb, and then test again at the outside socket terminals. If you now find the flashing 12v (but the bulb still doesn't light), either the socket or the bulb is bad. But if the flashing 12v goes away, then there is a bad connection somewhere up the line (which will pass enough current to power the voltmeter, but not enough to run the bulb).

FWIW, I had a lot of trouble with that socket being intermittant, until I realized that the wires were getting pulled tight when it was installed. Creating some slack in the wires made the problem go away.
 

TR3driver

Great Pumpkin - R.I.P
Offline
Normally, the wire from the RF turn signal runs through a short sub-harness up to the area behind the RH horn, where it joins with a GW wire from the main harness (2-way sleeve). The GW main harness wire runs from there over to the LH side, where it should be joined to the wire from the control head and another GW wire from the main harness (RR turn signal) (4-way sleeve).

Don't know if your car will match that, but those two junctions are where I would look next.
 

mrv8q

Luke Skywalker
Country flag
Offline
Had that exact same problem on my '3; turned out it was a bad bulb, although it <span style="font-style: italic">looked</span> fine..... didn't hurt cleaning up grounds, etc., afterward.
 
Similar threads
Thread starter Title Forum Replies Date
P TR2/3/3A TR3 turn signal and horn control wiring check Triumph 4
J TR2/3/3A TR3 turn signal issue Triumph 12
C TR2/3/3A TR3 Turn Signal Lever Triumph 3
O TR2/3/3A TR3 Turn Signal Lights Install Triumph 1
O TR2/3/3A TR3 Turn Signal Retrofit / Windshield Screws? Triumph 7
J TR2/3/3A TR3 right turn signal not working Triumph 15
tinman58 TR2/3/3A TR3 Turn signal Triumph 3
T TR2/3/3A turn signal repair tr3 Triumph 2
CraigLandrum TR2/3/3A TR3 Turn signal note Triumph 6
newmexTR3 TR2/3/3A TR3 turn signal return mechanism? Triumph 31
E TR2/3/3A stubborn TR3 turn signal wires Triumph 7
F TR2/3/3A TR3 Turn Signal/Horn control head Triumph 4
M TR2/3/3A TR3 turn signal replacement Triumph 2
S TR2/3/3A TR3 Turn Signal Auto Cut-Off Triumph 5
Kleykamp TR2/3/3A 1961 TR3 turn indicator diagnosis? Triumph 4
O TR2/3/3A TR3 Rear Turn lights Versus Rear Stop Tail lights? Triumph 5
J TR2/3/3A TR3 Too Rich- What direction do I turn the nut? Triumph 3
A TR2/3/3A WHY DOES MY TR3 STALL WHEN I TURN RIGHT? Triumph 26
S TR2/3/3A tr3 turn indicator Triumph 9
Moseso TR2/3/3A TR3 Brake/Turn Lighting Improvement Discussion Triumph 12
A TR2/3/3A TR3 turn indicator not flashing in car Triumph 8
bluemiata90 TR2/3/3A TR3 rack and pinion conversion /turn signals Triumph 9
M TR2/3/3A TR3 turn signals Triumph 5
gsalt57tr3 TR2/3/3A Left turn braking problem [TR3] Triumph 2
1 TR3 Fender spats sold on EBay. Triumph 0
J TR2/3/3A What size speedi-sleeve needed for pinion seal on a TR3? Triumph 6
T For Sale Free - Body Jig for TR3/TR3A Triumph Classifieds 0
J TR2/3/3A TR3 engine cylinder top clearance Triumph 22
BillyB62 TR2/3/3A Looking for the Owner of a TR3 Triumph 5
Pool Dad 1960 TR3 engine serial number Triumph 14
T TR2/3/3A TR3 coolant hoses Triumph 2
T TR2/3/3A Has anyone designed a hand brake warning light for the TR3? Triumph 3
J TR2/3/3A "TR3" painted on the engine block Triumph 13
J TR2/3/3A TR3 Rear seat Triumph 11
D Socket for TR3 Gear box drain plug Restoration & Tools 6
J TR2/3/3A TR3 gas tank mystery Triumph 5
T Wanted Wanted - 1956 TR3 Crankshaft Triumph Classifieds 0
jfarris TR2/3/3A Venture into the "dark side," Miata seats in a TR3 Triumph 2
T TR2/3/3A Question on old radio from my TR3 Triumph 9
T TR2/3/3A tr3 front carpet replacement Triumph 5
T TR2/3/3A Should there be a body ground strap to battery on TR3 Triumph 7
G For Sale: Triumph TR2, TR3, TR3A Sheet Metal Body Parts – Front Apron (valence) with grille, Bonnet (hood), Doors, Boot (trunk) Deck Lid Triumph Classifieds 3
G For Sale: Triumph TR2, TR3, TR3A, TR3B Factory Steel Hardtop, New Rear window, Partial Bracket Set Triumph Classifieds 2
A TR2/3/3A Early TR3 starter (bomb style) bushings sizes Triumph 5
T For Sale TR2 - TR3 Gas Cap for sale Triumph Classifieds 1
B TR2/3/3A TR3 Hard Top Triumph 2
D TR2/3/3A TR3 throttle linkage bell crank. Triumph 13
M TR2/3/3A Defective master cylinders Tr3 Triumph 13
BarryO TR2/3/3A setting up a TR3 clutch slave Triumph 5
M master cylinder brake/clutch Tr3 Triumph Classifieds 6

Similar threads

Top