Ive got a petrol/LPG vectra 2003 in ages and had to dismantle the dash to replace a gear cable which ment taking the LPG/petrol switch off and didnt jot down which wire goes to which of the 3 prongs does anyone have one who could tell me which colour wire goes to prongs 1, 2, 3 as no way of telling no dont wanna risk causing damage.