MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - 52 TD - need turn signal help

Left front light not coming on at all. Determined that the green with red might not be connected. Cannot locate where this wire ends butI might have traced it back to a silver box labeled "Lucas" under dash. Socket will work with test light if I jump one terminal.

I added a small wire to simulate what I did with test light and even though it came on, does not flash. Both rears and right front flash.

Does any one have a wire diagram or have a possible solution?
Vincent Piņa

http://www.ttalk.info/LateTDWiring.htm
Geoffrey M Baker

http://mgaguru.com/mgtech/electric/et105.htm

http://mgaguru.com/mgtech/electric/electr_1.htm (the master index with other tips)
George Butz

Thanks Geoffry. Looks like I might have a break in the green red wire because that is the way its hooked up. Ill check for continuity later.

Is there a way to test this box/indicator relay?

Perhaps I'll switch left and right turn signal wire and see if the opposite happens.
Vincent Piņa

Also see http://www.ttalk.info/Directionals.htm and read Gene Burgess' article. Bud
Bud Krueger

Thanks. That's helpful too Bud.

Sorry I spelled your name incorrectly Geoffrey. It was very late when I posted, blurry eyed and half asleep.

First step will be to jump a lead from the Green/red terminal on the relay to the socket and see if that will tell me if I have a broken wire - basically continuity.

I can get a test light to work by touching metal on the car so my guess is that a ground wire is bad to this socket (or vice versa because it's positive ground)
Vincent Piņa

Vincent. Hello from Norway. Obvously the flasher is OK. Use a test lamp and and
connect from terminal 2 on the relay box to
earth If thelamp flshes the term 2 and the
hole relaybox is ok.If the light stayes on without flashing the terminal 2 is broken.
inside the box.( burned contacts.)

Thoralf Norway TD4490
Thoralf Sorensen (TD4490)

If I put the wires back on as it was originally, red to one side, green/red to other, the side lamp will not light.

Are you saying that if I leave it as is now, with the jumped wire to simulate that it stays lit and I connect terminal 2 to earth, it'll flash? If not I have a bad indicator relay? Does the indicator relay control all 4 lights independently or left and right?
Vincent Piņa

Had the same issue. It was a poorly grounded fender lamp. It grounds through the two bolts that attach the housing to the fender. I loosened , then tightened the bolts with the park lights on. got it to work.

You most likely have tried this already.
C.R. Tyrell

I agree with C.R. on this one. 99% of electrical problems with lamps are usually bad grounds after you eliminate filament problems. And as he said you can get enough power sometimes back feeding through the connects to allow the parking lamp to light but not enough to drive the turn signal.

I got caught on this just the other day even though my lamps had worked for months prior. The ground really was not as solid as it should have been.
Christopher Couper

vincent. hello again from Norway.The 4 ind.lamps are independently controlled
Term. #2 left front, #3, left rear,
#6 right front,#7 right rear
Thoralf Norway TD4490
Thoralf Sorensen (TD4490)

This thread was discussed between 10/07/2014 and 12/07/2014

MG TD TF 1500 index

This thread is from the archives. Join the live MG TD TF 1500 BBS now