Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Anyone got one of these in a corsa?
I tried the install myself but cannot get any power, i understand i need to re-wire something but dont know what can anyone help?

hi there is a wire(not sure which colour) an u have to either earth or connect to ur handbrake its a safety device it will b a single wire it will tell u what 1 it is in ur handbook. hope this helps let me know how u get on