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 - Wiring Connections

Ok, I understand the wiring harness colors. For example, the red and the green/white wires go to the tail lights. One connects to the stop filament and the other connects to to the light filament. All good so far. BUT which connector on the back of the light assembly is which. They are not marked. How do I figure it out?? There are lots of places on the car which take multiple wires. How does one choose the right terminal? Would someone break it down real simply for me? Thank you.
Bill Reid TD4618

It's been a long time since I have been inside the taillamps. Is the plug symmetrical or unidirectional?

If symmetrical (ie the lugs are in the same place on both side) it does not make a difference which wire goes to which lug because you can flip the bulb around to match the correct wire.

If the bulb can only go in one way you will have to experiment to see which lug powers which filament. Just turn your parking lights on and see which lug produces the dimmer of the two.
Christopher Couper

If you inspect your bulb you will be able to identify the two filaments, the fine one is your parkers.

Graeme
G Evans

I had the same issue. I looked to see if I took a picture in my restoration journal for a quick answer but I think I deleted it to save space.

It's a 50/50 shot. Install both lamps and turn on the lights. If the parking lights come on. You're all set. If they are bright as if the brake pedal is applied, disconnect the battery and switch them up.

My first try I installed them incorrectly.

Frank
TF1414
Frank Cronin

Twelve volt battery and alligator clips provided the answer.....
Bill Reid TD4618

The tail/brake bulb can only go in one way due to offset prongs.

The front parking/turn can be inserted incorrectly, insert with Park light on, look for duller position.

Peter
P G Gilvarry

This thread was discussed between 23/10/2020 and 25/10/2020

MG TD TF 1500 index

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