oem sub and amp not working b5 facelift

lakerko

Registered User
Joined
Jul 12, 2012
Messages
4
Reaction score
0
Points
1
Location
NULL
Hi,
I have problem with my oem sub and amp. It´s not working for long time but I want to solve it now. But I don´t know where is the problem. I have the RNS-D navi plus, 4 speakers and sub in a trunk. I tried to measure the voltage, when radio is turned off i can measeru 12V on connector to amp but when I turn on the radio there is 0V. Where is the problem?