gohanis

im trying to install a jvc double din use harness # 70-8113 where i got it they told me it would work so i got it so i wire it up to my new radio so when im installing it to the car i forgot to turn off the stock radio when unplugging it when i install the new everything work as plan but when i turn off the car and back on again there was no sound at all then i plug in the stock radio back until it works again then unplug it then put the new one on and it works again it seem like the amp is not turning on with this harness is there any way i can make it work with this harness any help will be appreciated