I have just fitted a tow bar to my Vauxhall Astra 1.6 sports tourer estate with a brinks kit. I wired in the indicators and both work as should, tail lights work BUT the brake lights dont. Ive checked the fuse in car thats ok the brake lights on the car work ok so what can i do to get these working. Do both sides need wiring to the red wire ?? I used snap connectors as advised but im thinking i will need to cut the cars brake wire and solder the connection, the wiring instructions frown on that tho but i dont know what else to do please HELP