Club Triumph

Hi I'm having problems with my rear side lights my back lights wouldn't work when my front side lights are on  but when I put maine lights on the back lights work
So what I did I taped into the front side lights and put a wire from the front side lights to the back lights but when I did this my mane lights came on on the front when I had put the side lights on any way this is what I have don

Your tail lights and front side lights should already be on the same circuit, by the looks of things your tail light have been wired to the front head lights instead, So now that you have joined the tail lights to the side lights they are all joined together.

I'm not sure if that will pass an MOT

Does your car use a Dolomite wiring loom?

Yes it uses a dolomite wiring loom

Firstly have you recently changed ay bulbs if not it
Sounds like  a wiring fault at the rear light cluster or in the side light feed wire to the rear.

Hi I have done it now