Hi everyone,
Does anyone know what each of the 4 wiring harnesses on the late 90s Q45 are used for? I have a QX4 with the identical head unit and only 3 harnesses are used and I was wondering if the other one is an aux or something? Here is the back of the radio, I think it is the one on the right. https://images-sc1.netdna-ssl.com/D/Fac ... mage-2.jpg