Dear Guaire,
but I haven´t any "jumper" cable in my GT and headlight is on when ignition is on (and and when battery isn´t in good condition you have problems..)
GT originally has right hand bars switch without light operating switch (it has AHO), but I want convert it for manual switching lights.
I´m ordered whole new handle bar switch, where is more cables that original (more switchs inside), but some haven´t oposite side pin in connector..(or different colour)
I think that for manual switching headlight I will need "jumper" cable..