2007 Grand Voyager amp issue
 

Hello everyone, I'm new to this site, I have 2007 Grand Voyager uk spec, stock amp at rear of the car is not coming on if I disconnect the stock unit, im trying to install a after market dvd player but not getting any sound, by the help of other threads on this site now i have found the amp behind the rear speaker on the driver side and have taken the amp out and figured out that its coming on by a signal from the can bus by a single wire white with purple stripe, same wire is found at the back of the stock unit which gives the signal to the can can bus and can bus send the signal to the amp, i can't find a solution to turn on the amp with out that cable but I'm sure there must be a way to do it I hope some one here can help, any help will be much much appreciated thanks