Bit of an update.Took the car out last night and found the Handbrake light glowing when it was off remember this is now lit by a led not a bulb.So today had a look what was wrong as the speed converter still did not turn up.Found it was my turbo timer where it linked in to the handbrake switch and pulling the voltage down so making the led in the dash glow.Fixed this with a pull up link made with 2 4k7 resistors in parallel to lift the volatge back up.Linked it to the yellow on the mirror switch then in to the connector for my timer.
So now no glowing led and a working timer